Though not required of public domain images, if you want to credit the library as the source, please use the following statement: "From the San Francisco History Center, San Francisco Public Library" and provide a link back to the item on our Digital Collections site.
Folder: S.F. Districts-Waterfront-1867. On front: "Entered according to Act of Congress, in the year 1867, by C. E. WATKINS, in the Clerk's Office of the District Court of the United States for the Northern District of California."