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Reference #1 found on findagrave.com
Possible Gravesite at reference #2, I cannot read the inscription??
RIP my distant cousin. His coffin lies in a private alcove of the Cathedral of the Archangel, located in Cathedral Square of the Moscow Kremlin, Russia. Between the Great Kremlin Palace and the Ivan the Great Bell Tower.
Dear Mr. Hicklin,
Thank you for posting your request on History Hub!
The National Archives and Records Administration (NARA) is the depository of the permanently valuable non-current records of the United States Federal Government. Our mission is to preserve the records and make them available to the public. The photograph you seek is unlikely to be in NARA custody.
In addition, you may wish to check out WorldCat.org for sources not available online, as well as contact your school or public librarian which would be able to assist you in locating resources that are not online.
We hope this is helpful. Best of luck with your research!