What scientific work by William Harvey was lost during the English Civil Wars?

When parliamentary troops ransacked William Harvey’s house in Whitehall in 1642 during the English Civil Wars, he suffered the loss of a significant amount of his research and written work.1

Harvey considered the loss of his book on the generation of insects—which contained the results of extensive research—to be the "greatest crucifying" of his life. In addition to this manuscript, he lost numerous notes regarding his patients, postmortem examinations, and animal dissections.1