Engineering drawings allegedly cataloging the different kinds of snowflakes, although that would seem somewhat difficult if not impossible given that the mere act of catching a snow flake would melt it. There is some merit to this claim, as the artist was in the arctic. Via National Oceanographic and Atmospheric Administration (“NOAA”): “Snow crystals as observed and drawn by William Scoresby. In an account of the Arctic regions with a history and description of the northern whale-fishery, by W. Scoresby. 1820.”
What was W. Scoresby running from? An unhappy home life? What would send someone to the Arctic to chronicle snowflakes? It must have been traumatic.