As a result of official embarrassment and concerns over potential leaks just prior to the real invasion, all survivors were sworn to secrecy about the events by their superiors. There is little information about exactly how individual soldiers and sailors died. The US Department of Defense stated in 1988 that record-keeping may have been inadequate aboard some of the ships, and the most pertinent log books were lost at sea. A ninth LST () was scheduled to be in the convoy, but was damaged. Author Nigel Lewis speculates that some or all of its infantrymen may have been aboard "LST 507" when it went down. Various eyewitness accounts detail hasty treatment of casualties and rumours circulated of unmarked mass graves in Devon fields.