Collection contains primary and secondary letters, original deeds, and other ephemeral materials pertaining primarily to the Lincoln County War. Collection also contains reference letters relevant to Pancho Villa and his assassination.

The Lincoln County Collection consists of approximately ten feet of business, financial, and personal documents arranged topically and then chronologically after their transfer to the Museum of New Mexico from the Lincoln County, New Mexico Courthouse.

The William A. Keleher collection contains a variety of materials pertaining to the history of New Mexico. As a historian, Keleher conducted thorough research on the territorial era of the State. As a prominent lawyer and citizen of the State in the 1900's, Keleher's legal work and volunteer efforts helped shape the modern condition of New Mexico. Many of the documents related to his research, career and other interests are included in this collection.