Severance's "Genealogy and biography of the descendants of Walter Stewart..." claims he died in Council Bluffs, Iowa. Findagrave states it was Detroit, Michigan.
Merchant
Son of Billy Trowbridge (1781-1854) and Polly Stewart (1782-1859)(daughter of John Stewart and Ann McClellen Stewart)
Married first, Eunice Sophia Hastings Smith (b. 1809; m. 10 Sept 1840, Troy, Oakland, MI; d. 14 Oct 1849, Southfield, MI), widow of Dr. Washington Smith of Paris Hill, NY. She was a daughter of Dr. Seth Hastings and Eunice Parmelee Hastings.
Known children with Eunice Hastings Trowbridge:
*William Hastings Trowbridge (b. 16 May 1842; d. 22 Dec 1889, Danville, VA, never married)
*Frank Charles Trowbridge (twin, 1844-1844)
*Frederick Smith Trowbridge (twin, 1844-1844)
*Mary Seymour Trowbridge Laing (b. 31 May 1846; m. John W. Laing, 7 June 1871; d. Council Bluffs, Iowa)
*Sophia Eunice Trowbridge (1849-1849)
Married second, Sarah Louisa (Forsyth) Fisher (b. 8 June 1816; d. 9 Apr 1874, Detroit, MI), widow of William Fisher of New Orleans, LA and daughter of Dr. Elisha Forsyth of New Orleans.
No children with Sarah Forsyth Trowbridge
(findagrave.com)