This collection contains a series of records, photographs and related documentation collected by Homer E. Milford. They pertain to the Galisteo Mining District claims (1879) and Los Cerrillos Mining District claims (1879–1889). There is also a series of 1880 photographs of mining in the Cerrillos Hills by Santa Fe photographers Bennett and Brown and one by Ben Wittick of the Cerrillos smelter.

This collection contains personal and mercantile correspondence, letters, and fiscal items of Ambrosio Pino and Jose Ortiz y Pino of the Ortiz y Pino family of Galisteo. Additional materials contain legal documents (land grants and oil leases) from the early 1840’s to 1973