Greenhood and Newbauer Northern Express envelope
A prepaid 3 cent envelope with the Greenhood and Newbauer Northern Express Company logo. This would have been carried by them, but the US postage still had to be paid, regardless of whether the letter entered the US postal system. Sent from Wravern to San Francisco on 9 September. US date stamps did not normally include the year and there is no indication of this on the envelope.