Mexico. (San Francisco). 1876. Envelope addressed to San Francisco bearing Mexico 'Hidalgo' Yvert 58, 25c blue tied by oval Potosto dated stamp in red '9th Feb 76' , charged with hand-struck '3', with arrival San Francisco/Stream Ship 'Mar 14' with various instructional hand-stamps 'Advertised' and circular 'Not Found' with SanFrancisco/Advertised cds 'Mar 27' and adjacent erased triangular 'Dead Letter Office' on face in blue with hand-stamp instructional 'Have Your Letters And Papers Addressed to P.O. Box or To Street and Number, When they will be Delivered Free by Carrier'. Lovely item of mail from Mexico to San Francisco.