Dear Mr. McPhail,
Thank you for posting your request on History Hub!
We searched the National Archives Catalog and located a series titled Pension Claim Files, 1934 - 2001 in the Records of the Railroad Retirement Board, 1934 - 1987 ( Record Group 184) that may contain information about Alvin Robert Thompson. For access to these records, please contact the National Archives at Atlanta (RE-AT) via email at firstname.lastname@example.org
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 RE-AT. We apologize for this inconvenience and appreciate your understanding and patience.
Ancestry has digitized the records of the Railroad Retirement Board for 1934 to 1987. There may be a fee for using Ancestry. Instead, check for access at your local library as many library systems subscribe to these sites, making them free for their patrons.
We hope this is helpful. Best of luck with your research!