• It is possible the Cooper family traveled with the William S. Seely Company, who left two weeks before the Daniel D. McArthur Company. They are listed among people who left the outfitting place with that company. They traveled from England via the Manhattan and arrived in New York on 30 July 1867, a year prior to either company departure.  Henry Cooper, John's father, is listed as purchasing enough food rations for four people.

Daniel D. McArthur Company (1868)

• Age at Departure: 18

Sources

• 1870 Utah Census.
• “Captain D. D. McArthur memorandum book, 1868.” In Perpetual Emigrating Fund Company church trains accounts 1861-1868, Captains’ accounts 1862-1868. 
• New York Passenger Lists, 1820-1957.
• Utah Death Certificates.