The October 23 1946 edition of the Toronto Daily Star contained ads for three upcoming appearances by famous musicians.
The first was for violinist Yehudi Menuhin, playing at Massey Hall the next Monday:

Yehudi Menuhin (1916-1999) started his career early – he was a solo violinist with the San Francisco Symphony Orchestra when he was seven. He had a recording contract with EMI for seventy years, recording for them in 1929 and 1999.
Next up is another violinist, just billed as Kreisler, scheduled to play at Maple Leaf Gardens in the following month:

Fritz Kreisler (1875-1962) was born in Vienna, and became an American citizen late in life. His first performance in the U.S. was in 1888. Elgar’s Violin Concerto was composed for him.
Finally, there was a pianist, Claudio Arrau, who was to play at Massey Hall that night:

Claudio Arrau (1903-1991) was from Chile, and was a child prodigy – he was reading Beethoven sonatas when he was four. He developed a repertoire large enough to be able to perform at 76 different recital evenings.