The "Dodo-Postcards" watermark is NOT on the actual card – it is an online watermark only.
Castle Rock. Columbia River. Oregon. On The Line Of The O. R. And N. Williamson Haffner. Denver. Barkalow Bros. Railway News Service. Omaha. No. 1626
1460. Castle Rock. Columbia River. Oregon. On Line O. W. R. and N. Co. Geo. M. Wister. 1901. Edward H. Mitchell. 1911
Canon of Columbia River near Donald. B. C. Valentine. B. Hopkins
Canon of Columbia River near Donald. B. C. 103066. Valentine
St. Peters Dome Overlooking the Columbia River. Ore. Paul C. Koeber
245. Rooster Rock. Columbia River Highway. Oregon. American Art Post Card. Lipschuetz and Katz
Looking Up Columbia River at Rooster Rock. Ore. 719
Warwick Castle. Cows near River. B. B. Series No. A 3