He represented Burgeo-LaPoile in the Newfoundland and Labrador House of Assembly from 1855 to 1859. He was born in Portuguese de Grave, the son of Robert Prowse and Jane Woodley, and was educated at Acadia College and the University of Edinburgh. Prowse married Jean McLea.
He served as consul for Germany in Newfoundland.
He was also a director for the Saint John"s Gas Light Company and president of the Chamber of Commerce.