Yuseph Effendi Tartarian with his family and William Sachtleben on his sod roof top, Erzurum, Turkey, 1891 Description: Photograph taken during William Lewis Sachtleben's bicycle journey across Asia with Thomas Gaskell Allen Jr. Date: June 16, 1891 Resource Type: still image Photographer: Sachtleben, William Lewis Collection: Sachtleben (William Lewis) Papers. Collection 1841