The "Henrietta Marie" wreck has yielded more than 7000 objects (and more than 30,000 glass beads), the largest collection of artifacts known from a slave ship. They have contributed greatly to our understanding of slave ships and the slave trade. Parts making up more than 80 bilboes have been found at the wreck site. As bilboes were typically used to shackle pairs of slaves together, the ones found at the wreck site could have restrained more than 160 slaves. Other items found at the wreck site include trade goods apparently left over from trading for captives in Africa, goods acquired in Africa in addition to captives (including an elephant tusk), and gear belonging to the ship and crew. Part of the hull of the ship, including much of the keel and part of the stern post, have survived, and have been measured and reburied at the site.