Irving Howbert

• The Indians of the Pike's Peak Region
• The Indians of the Pike's Peak Region, Including an Account of the Battle of Sand Creek, and of Occurrences in El Paso County, Colorado, During the ... the Cheyennes and Arapahoes, in 1864 and 1868
• Indians of the Pike's Peak Region, Including an Account of the Battle of Sand Creek, and of Occurrences in el Paso County, Colorado, During the War with the Cheyennes and Arapahoes, in 1864 And 1868
• Memories of a Lifetime in the Pike's Peak Region