This is just one of the drawers of Sherborn’s index cards. It is now preserved in the NHM’s Library. Sherborn recorded in pencil each name, with the book or journal in which it was first published and the date, on a small slip of paper, 127mm by 63mm, and then duplicated it. It took him one month to edit 10,000 and one hour to number 1,500 of them. By 1916 there were more than one million slips. It took 3 years to put them into rough alphabetical order. These cards were for the years 1850–1899, and were never published. The volume of material for those years was so great it would have demanded a team of workers to complete the task, not solely CDS, and that was simply unaffordable. (With permission of The Trustees of the Natural History Museum, London)