From the PA Roots link:
Present Business - In 1887 the business register of Corsica was as follows:
J.B. Jones, general store; G.M. Simpson, dry goods and groceries; R.R. Snyder, dry goods and groceries; Isaac Lucas & Son, dry goods and groceries; F.R. Knapp, groceries and feed; Mrs. Ellen Ray, millinery goods; Miss Hettie Reed, millinery goods; Holden & Scott, drug store; C.N. Ray, dentist; D. Glenn & Co., shoe shop; W.H. Scott, shoe shop; Robert Moore, shoe shop; H.A. Smith, blacksmith; P.C. Love, blacksmith; A.P. Simkins, blacksmith; J.A. Myers, harness maker; Jones & Orr, planing- mill; A. Knabb, stave- mill and jointer; A.M. Slack, dealer in wagons and buggies, and undertaker; E.B. Orcutt, hotel; W.B. Glenn, barber.