1898, Registered letter from New York, Feb 4, 7 pm, 1898, franked with 220,228,275, 2¢ for the first class letter, 80¢ for the registry fee, the normal rate at that time was only 8¢, however, the cover is endorsed at left in violet "PRIVATE CARRIER", the back stamp is dated Feb, but the hour of delivery is not clear, considering that the cover only went from 187 Broadway to 1380 Broadway, that is quite a fee !! (Image)

Est. 50

1926, Registered-AR 20¢ Drop Letter Rate, #554,560(2), on 2¢ entire pays the 15¢ reg fee + 2¢ drop letter rate + 3¢ Return Receipt fee, dated Portland, Ore Apr 19, returned 'UNCLAIMED', (Image)

Est. 30