Lessons in chalk modeling, by Ida Cassa Heffron 69493 [Subtitle: The new method of map drawing] [Author: Ida Cassa Heffron] [Link: https://www.gutenberg.org/6/9/4/9/69493] [Files: 69493-0.txt; 69493-h.htm] Thanks to Steve Mattern and the Online Distributed Proofreading Team at https://www.pgdp.net Regards, Al