(Mariposa) Yosemite Hotel, Yos. Valley, J.M. Hutchings, Prop., Aug 27, 1871, blue double-circle datestamp (MAR-2200) ties 3¢ green (147) on cover to Delaware City Del., additional cds strike adjacent, original letter accompanies, Very Fine. Estimate  $400 - 600. A CHOICE STRIKE OF THIS EXCEEDINGLY RARE POSTMARK. This hotel postmark was the first device used at Yosemite. $0 (Image)