His first ship manifest, that I can find, was from 1902 aboard the vessel Vancouver. As we go through various documents over the next few days, this date and the vessel also vary. There is also a record from 29 May 1905 aboard the vessel Romanic.
Ship Manifest: 1 Jun 1902
National Archives and Records Administration (NARA); Washington, D.C, Boston, Passenger and Crew Lists, 1820-1954 about Erminio Cassano, List No. 2, Line 27. Cit. Date: 23 Jun 2014.
Name: Erminio Cassano
Estimated birth year: abt 1881
Birth Place: Torre le Nocelle
Port of Departure: Naples, Italy
Ship Name: Vancouver
Arrival Date: 1 Jun 1902
Port of Arrival: Boston, Massachusetts
Friend's Name: Achille Ardolino
Last Residence: Corie Cenvcolle
In Possession of Money: $10.00.