

The Porter Motor Company advertisement appeared in The Strand Magazine in May 1900 [left] and in The Wide World Magazine for June 1900 [right].

The Porter Motor Company advertisement appeared in Floyd Clymer's Steam Car Scrapbook, p. 35. As with almost all of the illustrations and material in his Scrapbook, (a very appropriate description) Clymer lists no sources.[2]
[1]Georgano, G. N., Encyclopedia of American Automobile, (New York, E. P. Dutton & Co., 1968), p. 162.
[2]Clymer, Floyd, Steam Car Scrapbook (1954 Bonanza Books), p. 35.