Dear Ms. Gullikson,
Thank you for posting your request on History Hub!
We searched the National Archives Catalog and located the series Indexes to the Carded Records of Soldiers Who Served in Volunteer Organizations During the Civil War, 1899 - 1927
in the Records of the Adjutant General's Office, 1762 - 1917 (Record Group 94) that includes a digitized index card titled [Minnesota] Quinn, Thomas F - 1st Cavalry (Mounted Rangers), Company K. The card is available for viewing via the Catalog.
We also located the Carded Records Showing Military Service of Soldiers Who Fought in Volunteer Organizations During the American Civil War in Record Group 94 that may include a file for Thomas F Quinn. Unfortunately, the records for Minnesota Volunteers have not been microfilmed or digitized. In addition, we located the series Regimental and Company Books of Civil War Volunteer Union Organizations, 1861 - 1867 in Record Group 94 that includes the Regimental and Company Books of the 1st Minnesota Mounted Rangers. For access to these non-digitized records, please contact the National Archives at Washington, DC - Textual Reference (RDT1) via email at firstname.lastname@example.org.
There also may be a pension file for him that provides additional information about his service. The majority of Civil War pension files in the Records of the Department of Veterans Affairs (Record Group 15) are in the custody of the National Archives at Washington, DC - Textual Reference (RDT1). There are also 3 record series (XC files) in Record Group 15 in the custody of the National Archives at St. Louis (RL-SL) that include claims files relating to Civil War Veterans. These records were transferred to the National Archives in 1952 and 1955 from the VA. Please email both RDT1 at Archives1reference@nara.gov and RL-SL at email@example.com with full details about the file you are seeking.
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 RDT1 and RL-SL. We apologize for this inconvenience and appreciate your understanding and patience.
We hope this information is helpful. Best of luck with your family research!