It is Johannes Brahms, and he wears the mask of a musical masker....
"Melomaniacs"
James Huneker
But Ethie had decided upon her role without consulting him, and so he walked over piles of ancient-looking finery and got his boots tangled in the golden wig which Ethie had hunted up, and told her he should be glad when it was over, and wished mentally that it might be Lent the year around, and was persuaded into saying he would go to the party himself, not as a masker, but in his own proper person as Richard Markham, the grave and dignified Judge whom the people respected so highly.
"Ethelyn's Mistake"
Mary Jane Holmes
Then the gorgeous masker would cross the hall, and disappear behind a great curtain of tapestry that covered an open doorway leading to the garden.
"Lady-Betty-Across-the-Water"
Lowell, Orson