Moses And Mrs. Aintree
Published in Adventure, September 10, 1922.
Jimgrim sends a cablegram to his friend, Jeff Ramsden, to meet two fellows named Brice and Allison on a boat just coming into New York. They are in search of evidence of the real life and times of the prophet Moses and the trek will take them all over North America. It will also put them into contact with and likely conflict with Mrs. Isobel Aintree, a female evangelist with some strong ideas of her own.
Note: Jimgrim is not really involved in this adventure other than the introduction.