^ abCutright, Paul Russell (July 1982). Contributions of Philadelphia to Lewis and Clark History. Portland, Oregon: Lewis and Clark Trail Heritage Foundation, Inc. pp. 33–35. ISBN0-9678887-0-0. "An anomaly of some proportion is the fact that the 1814 account, now commonly referred to as the Biddle edition, carried no mention of Biddle anywhere. ... The only logical explanation of this incredible omission is that Biddle wanted it that way, insisted on complete anonymity."