I'm from the Casselberry line in Lycoming County, PA.I did a search on Ancestry.com some time back on the 1910 Miracode Index for PA and I came across your Lewis Casselberry.
Center Co., Enum. Dist. 22, visit 22. M Elizabeth, mother, age 69 birth place NY. J Lewis Casselbury, husband, age 40 birth place NY. G Hattie, wife, age 33 birth place PA. C Eva, daughter, age 8 birth place PA. N Ruth, daughter, age 7 birth place PA. H Nathan, son, age 5 birth place PA. K Nannie, daughter, age 3 birth place PA.