horizontal pair with huge margins, each with manuscript "X", on 1844 folded letter to New York City, black "Wells & Co's Express Mail from Chicago" circular handstamp at upper left, cover with vertical file fold through left stamp, very fine, the small Wells Chicago handstamp is one of the rarest of all independent mail markings and its use on a cover with Wells adhesives is particularly remarkable, very fine appearance, 2022 Philatelic Foundation certificate