A broad way to categorize the subjects of Thoreau's drawings in his Journal is to sort them as either flora or fauna, which forms the basis of the above timeline. The timeline as it stands, unfortunately, isn't very revealing because we are presently working with a small set of his drawings. However, as we continue to catalogue and add images to this collection, the number of items in this timeline will grow, which will allow us to search for recurring patterns in Thoreau's imagination. Was Thoreau inspired by flora in the spring and by fauna in the summer? What bearing did the spartan snowy landscape in February have on his doodles? Given Thoreau's conscientious notetaking and the fact that he begins each entry with a precise date, we might be able to find answers to such questions by plotting each image on such a timeline.