Mezue ahịrịokwu na-esonụ: N'afọ 1915, Davidson na ụmụ akwụkwọ ndị ọzọ ruru iri atọ ji ụgbọala ndị Cadillac asatọ a rụgharịrị arụgharị mee njem si na Chicago ruo
Ihe ngosi na San Francisco na nloghachi n'etiti nnukwu mkpọtụ site n'aka ndị nta akụkọ n'ụzọ. Ụgbọala ahụ malitere n'akụkụ ụlọ akwụkwọ Highland Park ebe Davidson nọ n'ụgbọala Reconnaissance. Ha malitere n'June 10, 1915, ha bu n'obi ịgafe Moline, Iowa City, Omaha, Denver, na Salt Lake City iji ruo San Francisco maka Ngosi Panama-Pacific na July 14, 1915.