Dear Ms. Beard,
Thank you for posting your request on History Hub!
We searched the National Archives Catalog and located the Logbooks of U.S. Navy Ships, 1801 - 1940 in the Records of the Bureau of Naval Personnel (Record Group 24) that include the deck logs of the USS Pensacola for 1907. We also located Muster Rolls of Naval Ships and Shore Establishments, 1/1898 - 6/30/1939 in Record Group 24 which may include muster rolls of the USS Pensacola for December 1907. For access to these logs, please contact the National Archives in Washington DC - Textual Reference (RDT1) via email at email@example.com.
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We hope this is helpful. Best of luck with your research!