Here is an article that does indeed link Frank Sargent and Ernest Hares:
January 22, 1924 New Castle, Pennsylvania
"The Royal Welsh Singers presented by Frank Sargent a notable concert manager and survivor of the Titanic (Lusitania?) will give a concert Tuesday evening at 8 o'clock in the First Baptist church under the auspices of the Men's Bible class of the Sunday School.
There are four members of the company and all are artists of ability. D. Edgar Davies, baritone. Is considered one of the greatest vocalists ever brought to this country. He has obtained the highest achievement in his art by winning "National Wales".
Grift Howell, tenor, Ernest Hares, boy concert pianist, and Miss Gladys Smith, soprano and reader are considered among the best Welsh artists on the platform today."