W. F. Costello, a prominent young attorney of Maysville, and a member of the firm of Low & Costello, real estate and collecting agents, was born in Champaign City, Ill., on May 25, 1860. He was one of twin brothers born to James T. and Anna M. (Corchran) Costello. The father was born in Sandersville, Ga., about 1842, and was of Spanish descent. From Georgia, he removed to Greenfield, Hancock Co., Ind. He was an editor, and for a time edited the Hancock County Democrat. In 1865 he went to Leavenworth, Kas., where he was killed. The mother was born in Ireland in 1840, and immigrated to America in 1849. She now resides at Hamilton, Mo. W. F. came with his mother to Missouri in 1866, and located at Kingston, Caldwell County, where he was reared, and received a good education in the high school. He began the study of law at Hamilton, Mo., in the office of Dilley & Johnson. In 1883 he entered the law department of the University, Ann Arbor, Mich., graduating the next year. In the same year he immigrated to Idaho, and practiced his profession for twelve months. Returning home he remained six months, and in July, 1886, located in Maysville and resumed his practice.
Source: History of Andrew and DeKalb Counties, Missouri (Chicago: Goodspeed Publishing Company, 1888), p. 556.