William Sachtleben with bicycle next to a flour mill along the route from Geyve to Beypazari, Turkey, 1891 Description: Photograph taken during William Lewis Sachtleben's bicycle journey across Asia with Thomas Gaskell Allen Jr. Date: April 8, 1891 Resource Type: still image Photographer: Allen, Thomas Gaskell Collection: Sachtleben (William Lewis) Papers. Collection 1841