Bertram, and Saxton.

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17 Mins.; One. Here is a team of men that is due to be seen on the big time. They have appearance, personality and voices.  The opening is a novelty. One appears and starts with an operatic aria, the other joining him and then as the audience settles back into their seats prepared to receive a dose of the classical, the two switch to syncopated melodies and everyone sits up again. One does a solo “When My Baby Smiles at Me” being the number after which “Budaha” is offered” as a double, then “Daddy You’ve Been A Mother to Me” is rendered as a single with a yodel double at the finish. For an encore they did “Dardanella.”
Source:
Variety LVIII: 2 March 1920