The eagle carrier was mostly used in just a few cities, so most covers show the carrier fee paid with the 1851, 1857 and 1861 government postage stamps.

1857 issue 3˘ letter rate with carrier fee

1857 issue 10˘ transcontinental rate with carrier fee

1861 issue 10˘ transcontinental rate with carrier fee

1861 issue 10˘ transcontinental rate with carrier fee - 3 #65 stamps and 2 #63 stamps