Cello and Viola?

I was reading a document titled, "Sketch of the Life of Emma Prosser Toone by a Grand-Daughter Dora Toone Brough Daughter of her Son Charles J. Toone."

This document is not dated, but a hint as to its age is contained in a paragraph that reads, "Recently in 1960 the old 20th Ward was divided into 4 wards."

An interesting reference to join playing in the Salt Lake Theater reads as follows," How happy Emma was when she sat in the theatre with her black or brown lace trimed (sic) dress and saw her John in the orchestra playing the cello or other times the viola during the performance of some Shakespeare's (sic) plays or some of the local Utah actors and actresses in their parts of very wonderful home dramatics."

This is the first reference I have seen that refers to John playing both instruments.