Letter from Charles F. Binns to Mrs. C. R. Armstrong, February 10, 1921
Binns writes Armstrong about sending her a school catalog and suggests "The best available book at present time is “Pottery” by Cox. No doubt, you would find my book, “The Potters Craft” of value but it is out of print."
Charles F. Binns, The Potter's Craft, Pottery, for Artists, Craftsmen & Teachers, George James Cox, C.R. Armstrong