Not my family line, just sharing.
The following Biographical sketch was copied from the book "HISTORY AND BIOGRAPHY COUNTIES OF WHITE AND PULASKI, INDIANA. Historical and Biographical. Illustrated. Chicago; F.A. Battey & Co., Publishers. 1883.
page 737, Van Buren Township, Pulaski County, Indiana.
"GEORGE W. CLARK was born in Tolland County, Connecticut, January 3, 1815, and is the son of THURSTON CLARK, whose father, CAREY CLARK, came from England, settled in Connecticut, took part in the war of the Revolution, and died about 1831. His four sons were named CAREY, WILLIAM, SANDS and THURSTON. THURSTON CLARK was thrice married and was the father of nine children. GEORGE W. CLARK is the youngest of the five children borne by THURSTON's last wife, LUCY SMITH, viz., WILLIAM, NELSON T., MARY, HATTIE A., and GEORGW W., our subject, who at the age of eighteen began a seaman's life, which he followed twelve years. He shipped at New London, Connecticut, visited the Crozette Islands, Van Dieman's Land, King George's Sound, Doubtful Island Bay, Hobart Town, Alaska, Sandwich Islands, China Sea, Cape Horn, Rio Janeiro, New Orleans, Mobile, Liverpool, Quebec, St. Johns, and many other places. September 12, 1848, in Hartford County, Connecticut, he married MARTHA A. ALLEN. In the fall of 1853, he came to this township and settled on his present farm, where he kept his family five years and engaged in boating in Alabama. He has a fine farm of 204 acres, and there have been born to him four children - WILLIAM, LUELLA (deceased), CHARLES T. and ALICE D. (deceased.)"