An artist, C. Kemper, did paintings of early Arizona?

Question:

An artist, C. Kemper, did paintings of early Arizona?

Of Teddy Roosevelt driving to see Theodore Roosevelt Dam, Phoenix in the 1870s, the original Salt River Valley Users Association in 1903 including L. Orme, D. Heard, P.T. Hurley, A.J. Chandler and others. Any information about this artist?

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Charles Kemper (1876 - 1948) Born in Biggs, Butte County, CA on June 26, 1876. Kemper settled in Sacramento in 1893. For many years he was a conductor for Southern Pacific Railroad while painting in his leisure. He was active with the Northern California Arts, a society of amateur painters, until his death in Sacramento on Oct. 18, 1948.