- The Leading Facts of New Mexican History, Vol. I (Hardcover)
- The Spanish Archives of New Mexico, Volume One (Southwest Heritage Series)
- The Leading Facts of New Mexican History, Vol II (Softcover)
- Spanish Colonization in New Mexico in the Oñate and De Vargas Periods; Read Before the Society at its August, 1919, Meeting
- Colonel Juan Batista de Anza, governor of New Mexico; diary of his expedition to the Moquis in 1780; paper read before the Historical society at its ... introduction and notes by Ralph E. Twitchell