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Dear Mr. Knight,
Thank you for posting your request on History Hub!
We searched the National Archives Catalog and located a series titled Activities, Facilities, and Personalities, 1886 - 1967 (26-G) in the Records of the U.S. Coast Guard (Record Group 26) that the photos that you listed above are part of. For copies of photographs from this series, please contact the National Archives at College Park - Still Pictures (RDSS) via email at email@example.com.
We hope this information is helpful. Best of luck with your research!