Item consists of 9 autograph note cards containing both typescript and autograph notes. The notes document early filling records for Dr. Macleod's insulin including insulin made from skate. The notes record the dates for the Berkefeld test, Labels, Sterility, and amount filled. 6 cards are titled 'Dr. MacLeod's Insulin,' 2 cards are titled 'Insulin Dr. MacLeod' and 1 card is titled 'Mr. McCormick Insulin.'