Letter from E. M. Holmes to unknown about the contents of cases and their drawers which include differerent types of algae to answer the recipient's enquiries. Holmes says that there are two foreign cases, which contain drawers of different sizes, and also mentions British algae. On the third and fourth pages, there are sketches of the case and the numbered drawers with their measurements. Letter is composed on 3 pieces of paper in total, on 12 half-pages.