Keywords: Stamp US 1940 2c Mark Hopkins.jpg 1940 United States Post Office Department en postage stamp honoring Mark Hopkins USPS 1940 United States Post Office Department PD-USGov-pre1978stamp Original upload log page en wikipedia 00MarkHopkins jpg Upload date User Bytes Dimensions Comment 2009-02-18 02 57 38 Pastor Theo 36204 283×300 <small> US stamp honoring Mark Hopkins USPS 1940 USPS Public domain </small> Famous Americans Issues Theologians from the United States Educators from the United States Theologians on stamps Philatelic uploads by Ww2censor United States Red stamps Mark Hopkins |