Considering it was mailed in 1903, this card (with stamp and postmarks on each side) is in great condition.  We like it very much when the multiple postmarks are from posting and receiving offices:  in this case, Oxford (U.K.) and Buffalo (New York), only ten days apart.  No airmail then — but faster than now!  As for Cliveden reach, once again thanks to Wikipedia for this: “Cliveden Reach, between Cookham Lock and Boulter’s Lock, is one of the classic scenic stretches of the river Thames. Cliveden House may be accessed by watercraft from the mooring on Cliveden Reach half a mile downstream from Cliveden boathouse.”  Grade: 2