Dear Robin Brent,
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 the pension of Thomas Francis Sullivan. 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. In response to the COVID-19 pandemic, the National Archives has partnered with Ancestry to make the vast majority of their NARA-digitized holdings freely available to the public. Anyone with Internet access may create an account, access NARA records, and use other Ancestry resources, such as their educational offerings and family tree-maker application. For more information see Ancestry’s announcement -- “Free At-Home Education Resources From Ancestry® and Access to Nearly 500M National Archives Records”.
We also suggest that you contact the Milwaukee Public Library Archives, as they were designated as the official archives of the Chicago, Milwaukee, St. Paul & Pacific Railroad, a.k.a. the Milwaukee Road, in 1981.
We hope this is helpful. Best of luck with your research!
Dear Cara Jensen, Thank you very much for the links and information