He was the son of Edward Adolphus Seymour Mignon and Margaret Bridget (née Campbell).
Besides the two professional bowlers he was the most heavily used but his bowling was regarded as "very disappointing" perhaps because "at the start of the trip he was by no means fit".
His only first-class appearances were for AB St Hill's combined team which toured Trinidad in 1898-99 and 1900-01.
He had played for Grenada against Lord Hawke's team in 1896-97 where he impressed taking 6-44 for St. George's C.C.
In the first match against Bennett's team he took 5–70 in the only innings of the English side bowling alongside Richard Ollivierre.