Marshall’s sex book was a semi fictional book based on his own experiences and the episode he referred to happened with his first wife to whom he was married between the years 1930 to 1935.
The Port of Entry papers referred to were mentioned by Ed Hale and I discounted that having had personal experience traversing the border between B.C. and the U.S. quite often in the 1960’s. No records were kept at that time of such trips.
THanks.