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Public invited to view ‘treasures’ from historic Rooswijk wreck this August

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New research has revealed insights into the cargo and crew of the 18th-century Dutch East India Company (VOC) ship the Rooswijk, wrecked off the Kent coast. Maritime archaeologists are diving the site, continuing the excavations started last summer, with the aim of revealing more of the Rooswijk’s story.

A drawing of a ship similar to the Rooswijk – a Dutch ‘hekboot’ by Adolf van der Laan in 1716. (Copyright) Collection of the Fries Scheepvaartmuseum.

Over the weekend 11-12 August the public will be able to see extraordinary finds from the Rooswijk and explore the techniques and technology the archaeologists are using. Project specialists from conservators and archaeobotanists to zooarchaeologists and material scientists will be on hand to answer questions.

The Rooswijk sank on the treacherous Goodwin Sands in January 1740 with all 237 crew lost. Thousands of vessels are known to have been wrecked in this area, dubbed ‘the great ship swallower’.

Researchers in the Netherlands have been able to postively identify and name 19 of the 237 members of the Rooswijk’s crew from documents held in Amsterdam archives. Until now it was only clear that the Rooswijk was under the authority of skipper Daniël Ronzieres, as all other records of the crew and passengers were lost in the shipwreck. Two tibia (leg bones) from two individuals have been recovered from the wreck and there is potential for more human remains to be found.

Collection of the different coins that were found in the wreck of the Rooswijk. Copyright Historic England/Cultural Heritage Agency of the Netherlands

The Rooswijk set off on its last journey, from the Netherlands to Batavia (modern-day Jakarta), with a lot of silver on board – all of it destined for trade in Asia. The precious metal was in high demand and was exchanged for asian spices and porcelain. The value of the Rooswijk’s known cargo is thought to have been more than 300,000 guilders. The cargo was in the form of silver ingots and ‘pieces of eight’ – Mexican reals – these were minted to a recognised standard weight, making them perfect for international trade.

However, archaeologists have uncovered lots of other, older coins at the wreck site including ducatons from the Republic and the Southern Netherlands (now Belgium) that were not part of the sanctioned cargo. This suggests that the Rooswijk’s passengers and crew were carrying extra silver to trade illegally.

Other coins found during the dives have small holes deliberately made in them, an indication that the crew sewed them into their clothes to smuggle to the Dutch East Indies. Concealing the coins in this way also kept them safely hidden from others on board. At this time we know that people were smuggling silver in their shoes and belts, such was the demand overseas.

As a protected wreck site the Rooswijk’s remains are owned by the Dutch Government, and managed by Historic England on behalf of the Department for Digital, Culture, Media and Sport. The #Rooswijk1740 project is led by the Cultural Heritage Agency of the Netherlands, in collaboration with Historic England and contractor MSDS Marine.

Collection of the pewter jugs found in the wreck of the Rooswijk. Jugs like this were used to hold liquids and used by the officers and higher ranks on board. Copyright Historic England/Cultural Heritage Agency of the Netherlands

Martijn Manders, project leader of #Rooswijk1740, said:

“The Rooswijk is special because it tells us about ordinary people of that time, but also about entrepreneurship, and (trade) relationships that ensured connections between cultures all over the world. We consider this to be shared cultural heritage. We therefore work closely with our counterpart Historic England. Our British colleagues are now mainly working on the conservation of the finds in Portsmouth, which is a very important part of the project. The finds help us tell the story of the people on board, we can relate specific personal objects to what they did in general: how they lived, what the circumstances were on board the ship.”

Duncan Wilson, Chief Executive of Historic England, said:

“It’s extraordinary that after more than 270 years we now know the names of some of the people who may have lost their lives with the Rooswijk. Sea-faring was a dangerous way of life and this really brings it home. The revelation that the Rooswijk was used to smuggle silver adds to our understanding of global trade at this time – we shall have to wait and see what else we might discover from this site in the coming months.”

Archaeologists are continuing to investigate the wreck. They are finding more personal items alongside boxes and barrels in the galley behind the main mast. A ‘knee’ – a huge piece of angled wood used to support the deck – has been uncovered and will be investigated and recorded to illustrate the enormous size of the ship. The team is working towards where the stern of the ship should be with dives continuing until mid-August.

A nit comb, lead cheese container, pewter vessels and a chest full of thimbles are some of the personal items that have been conserved since their recovery from the wreck site.

For further information on the excavation and the open weekend this August visit: www.historicengland.org.uk/get-involved/visit/rooswijk-shipwreck-excavation

Marine Life & Conservation Blogs

Creature Feature: Undulate Ray

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In this series, the Shark Trust will be sharing amazing facts about different species of sharks and what you can do to help protect them.

This month we’re looking at the Undulate Ray. Easily identified by its beautiful, ornate pattern, the Undulate Ray gets its name from the undulating patterns of lines and spots on its dorsal side.

This skate is usually found on sandy or muddy sea floors, down to about 200 m deep, although it is more commonly found shallower. They can grow up to 90 cm total length. Depending on the size of the individual, their diet can range from shrimps to crabs.

Although sometimes called the Undulate Ray, this is actually a species of skate, meaning that, as all true skates do, they lay eggs. The eggs are contained in keratin eggcases – the same material that our hair and nails are made up of! These eggcases are also commonly called mermaid’s purses and can be found washed up on beaches all around the UK. If you find one, be sure to take a picture and upload your find to the Great Eggcase Hunt – the Shark Trust’s flagship citizen science project.

It is worth noting that on the south coasts, these eggcases can be confused with those of the Spotted Ray, especially as they look very similar and the ranges overlap, so we sometimes informally refer to them as ‘Spundulates’.

Scientific Name: Raja undulata

Family: Rajidae

Maximum Size: 90cm (total length)

Diet: shrimps and crabs

Distribution: found around the eastern Atlantic and in the Mediterranean Sea.

Habitat: shelf waters down to 200m deep.

Conservation Status : As a commercially exploited species, the Undulate Ray is a recovering species in some areas. The good thing is that they have some of the most comprehensive management measures of almost any elasmobranch species, with both minimum and maximum landing sizes as well as a closed season. Additionally, targeting is entirely prohibited in some areas. They are also often caught as bycatch in various fisheries – in some areas they can be landed whilst in others they must be discarded.

IUCN Red List Status: Endangered

For more great shark information and conservation visit the Shark Trust Website


Image Credits: Banner – Sheila Openshaw; Illustration – Marc Dando

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Guarding Against Coral Invaders

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coral

Protecting (Dutch) Caribbean Reefs from Unomia stolonifera

Recent reports highlight the concerning spread of the invasive soft coral, Unomia stolonifera, currently devastating Venezuela’s marine ecosystems and detected in Cuba. With the potential threat of its expansion to the (Dutch) Caribbean islands, urgent action and awareness are essential to safeguard marine biodiversity and local economies from possible catastrophic consequences.

Invasive species are animals or plants from another region of the world that don’t belong in their new environment. These species can have major ecological effects by decimating native flora or fauna. They can also cause large economic losses and impact human health. Invasive species also pose a significant threat to marine ecosystems worldwide, including the Dutch Caribbean. Among these invaders is the octocoral species Unomia stolonifera or “Pulsing Xenia”, originally from the Indo-Pacific. With its rapid growth and lack of natural predators, this species can outcompete native species and disrupt fragile marine habitats such as seagrass beds and coral reefs.

Background

The invasive soft coral U. stolonifera was first identified in 2014, off the coast of Venezuela. It is believed to have been introduced via the illegal aquarium trade.  Since this species can reproduce sexually and asexually (or fragment), even small pieces can regenerate to spread.  Once introduced it quickly took over shallow reefs and hard substrate at depths of 0-50 meters, outcompeting local corals and seagrass for space.  Follow on surveys found that this coral species exhibited average percentage cover as high as 80%, vastly outcompeting native corals. In highly colonized areas, fish are disappearing due to loss of habitats.

In 2022, during a survey conducted in Cuba by the University of Havana, an unknown octocoral was discovered which was later identified as the invasive Unomia stolonifera. It is suspected that the coral larvae arrived in ballast water from fossil fuel ships originating from Venezuela, as nearby sites adjacent to Venezuelan ports have been heavily affected by the invasion.

How to help

Prevention through continuous monitoring, particularly in high-risk areas such as marine harbors and oil facilities, is paramount. Early detection plays a pivotal role in mitigating the threat posed by Unomia stolonifera.

The public’s involvement and awareness are also vital. Local communities, recreational divers, tourists, and all stakeholders are urged to participate in early detection efforts by reporting sightings (photo, location and date) of this invasive coral to their respective Protected Area Management Organization (PMO’s)- the Fundacion Parke Nacional Aruba (FPNA)STINAPA BonaireCARMABI Curaçao Saba Conservation Foundation (SCF)Nature Foundation St. Maarten (NFSXM) and St. Eustatius National Parks (STENAPA). If an invaded area is confirmed, follow the recommendations by the local PMO’s.

Keys to Success

Despite the challenges, early detection is key to mitigating the threat posed by Unomia stolonifera. With continued vigilance, research, and community engagement, there is hope for containing this potential issue before it becomes a major threat.

About the DCNA

The Dutch Caribbean Nature Alliance (DCNA) supports (science) communication and outreach in the Dutch Caribbean region by making nature related (scientific) information more widely available through amongst others the Dutch Caribbean Biodiversity Database, DCNA’s news platform BioNews and through the press. This article contains the results from several scientific studies but the studies themselves are not DCNA studies. No rights can be derived from the content. DCNA is not liable for the content and the in(direct) impacts resulting from publishing this article.

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