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Cynthia and Crawford can both be found on findagrave.com
along with many, many family members
There is a family tree on familysearch.org. family search is free, you will need to register to search
There are 3 pages of allotments on familysearch.org. I think you will find your answer there
The Marlow family history of Fannin Texas by Don Thomas
Dear Ms. Flynn,
Thank you for posting your request on History Hub!
Death or birth ledgers were sometimes kept by Tribes or Agencies. Since the National Archives at Fort Worth (RM-FW) has custody of period records for the Five Nations and Choctaw Agency, we suggest that you contact RM-FW via email at firstname.lastname@example.org to request a search for any record of the death of Crawford Marlow.
Due to the COVID-19 pandemic and pursuant to guidance received from the Office of Management and Budget (OMB), NARA has adjusted its normal operations to balance the need of completing its mission-critical work while also adhering to the recommended social distancing for the safety of NARA staff. As a result of this re-prioritization of activities, you may experience a delay in receiving an initial acknowledgement as well as a substantive response to your reference request from RM-FW. We apologize for this inconvenience and appreciate your understanding and patience.
In addition to the information from the previous poster, we suggest that you search substitute record sources such as probate records, church records, and newspaper records for more information about the death of Cynthia and Crawford Marlow.
We hope this is helpful. Best of luck with your family research!
[Information provided by Cody White, Subject Matter Expert]