His cousin Elisha Hunt Allen (1804–1883) was United States Minister to the Kingdom of Hawaii at the time S. C. relocated to the islands in 1850.
[2] On May 31, 1858, Allen received from Kamehameha IV a commission to take possession of unclaimed Pacific islands for the Hawaiian Kingdom.
After arriving in Hawaii, he used the name S. C. Allen professionally, and entered into a mercantile partnership with William A. Aldrich[5] and John Smith Walker.
He was one of the directors of C. Brewer & Co.,[8] which commissioned the New England Shipbuilding Corporation of Bath, Maine to build the bark (sailing ship) S. C. Allen.
[9] It was partially gutted in 1913 in Honolulu Harbor, by a fire believed to have been caused by a carelessly tossed lit cigarette.
The individual bequests made in the will included immediate family and distant relatives, close friends and employees, and public institutions.
[18] The marriage merged two families who would influence Hawaiii's politics, ecology, and business economy for decades.