You may want to contact those who worked on his FamilySearch profile to see if they are relations. Or contact users who worked on his descendants to see if they are relations.
Washington Lafayette Collins 1825–1892
https://www.familysearch.org/tree/person/vitals/G9L5-DVS
Or, if you can digitalize the materials and upload them to FamilySearch or on a Wikitree profile, researchers and family members will be able to use in the future. Or leave a note on his FamilySearch profile that you have these materials.