Miss Mabel Leonard, apparently some five years old, supported H. J. Montague at Wallack's Theatre in the month of October, 1874, when the _Romance of a Poor Young Man_ was produced, playing with a good deal of skill a little Breton peasant girl. The same young lady and Bijou Heron were the children in Miss Morris's version of _East Lynne_, called _Miss Multon_, at the Union Square Theatre in November, 1876. Their judicious training, and the careful acting of their not unimportant parts, added much to the general completeness of the drama, and will be still vividly remembered by all now living who were play-goers years ago. Of all the children who have appeared upon the stage during the past twenty years, Bijou Heron was one of the brightest and most promising. In face refined, intelligent, and attractive, in voice pleasant and sympathetic, in figure neat, graceful, and _petite_ even for her years, she had all the personal requirements of success in her profession, combined with careful training, quick comprehension, tact, intelligence, and love for her art. As the only child, and as the hope and idol of a once favorite actress, whose popularity was of so comparatively recent a date that she had not passed out of the memory of the theatre-goers of her daughter's time, she was kindly and affectionately received in New York for Matilda Heron's sake, even before she had won for herself, and by her own exertions, so many friends here. After long preparation she made her first appearance on any stage at Daly's Fifth Avenue Theatre, Twenty-eighth Street, on April 14, 1874, in a play entitled _Monsieur Alphonse_, from the French of the younger Dumas, by Mr. Daly, and first presented that evening in this country. It was probably one of the most thoroughly successful _debuts_ witnessed here in many years. Aside from the shyness and constraint so natural to the _debutante_, and without which no true actor ever stepped for the first time before a critical public, she bore herself naturally, simply, and with charming grace. The part is long and difficult, not one of the commonplace, childish _roles_ usually intrusted to infant players, nor one of the high tragedy star _roles_ sometimes inflicted upon juvenile prodigies, but a bit of leading juvenile business requiring more than ordinary intelligence and skill upon the part of its representative. Many actresses who have been years upon the stage, and who are considered beyond the average in their playing, would have played it with less appreciation and success.