Might be, E. Loomis, Mt. Morris, New York 1870 d. or Earl Loomis ( - 1870d.) South Hamilton NY, Golchester, NY,1823-1860.....(probably the same man).There is nearly a dozen gunsmiths with the last name of Loomis in "American Gunsmiths" by Frank Sellers...Post some pictures, then maybe someone on here will be able to tell you more about your rifle...