He made his London stage debut in December 1877 at Her Majesty's Theatre playing the tenor role in Thomas Haynes Bayly's English version of Adolphe Adam's opera The Swiss Cottage.
The Daily News wrote that Power "displayed a light tenor voice of very agreeable quality, and acted the part of the sentimental lover well", although The Times found his intonation "a little uncertain".
The Times said that his "sympathetic tenor voice was heard to great advantage in the sentimental music", and The Standard wrote that he "acts ... just in that simple-minded way that brings out most strongly the absurdity of the character, and he sings exceedingly well.
"[9] The Era agreed with the majority: "a very agreeable light tenor voice and a pleasing style, qualities which have already gained for him no little favour in the previous opera … [he has] good taste vocally and a fair amount of histrionic skill.
"[2] During the run of Pirates, Power took part in some Sunday matinée performances of new operettas along with D'Oyly Carte colleague Rutland Barrington, and on one occasion acted in a non-musical play, L'Aventurière, given in the original French by a cast headed by Herbert Beerbohm Tree.
[11] In August 1881, he created the role of Charles Lorrimore in the Edward Solomon and Henry Pottinger Stephens comic opera Claude Duval, at the Olympic Theatre, opposite Marion Hood, who had been his partner in The Pirates of Penzance.
[12] Power then became a teacher of singing,[13] continuing to make occasional appearances on the stage until the end of the century, mostly in concert and society events, and with Percy North's Operetta Company.
Together with Jessie Bond, Leonora Braham and Julia Gwynne, he was one of four artistes of the original D'Oyly Carte Opera Company who attended a reunion at the Savoy Hotel in 1914.