Signature Recto, lower right, below image, in ink: Ansel Adams
Inscription Verso, center, stamped: PHOTOGRAPH / BY / ANSEL ADAMS / ROUTE 1, BOX 181 / CARMEL, CALIFORNIA / TITLE Sonoma County Hills [hand-written in black ink] / NEGATIVE NO. 6-11-1 [also hand-written] / CREDIT _________ [blank]
Also, in pencil, lower right corner: DK 976
Board is marked Crescent Illustration Board, Hot Press Surface No. 200 Heavy Weight