^"Bicycle Policemen Capture Three After Long, Hard Chases.". New York Times. January 19, 1905. Retrieved 2009-07-23. "Walter L. Marr of Detroit who has a reputation as a designer of automobiles and as a racing chauffeur, and who is exhibiting machines at the Madison Square Garden for a manufacturer, was arrested while giving a prospective customer a ride up in Lexington Avenue yesterday afternoon, charged with failing to display a license number on the machine."
^"Walter L. Marr". New York Times. December 12, 1941. Retrieved 2009-07-23. "Walter L. Marr, pioneer automotive engineer and originator of the ... Mr. Marr was born in Lexington, Mich., and began his mechanical career in 1882 as an ..."