act a part

References in classic literature ?
But he, it seems, was so stricken in years, and possibly his memory so weakened by infirmities, that he could give them but little light into their inquiries; and all that could be recollected from him of his brother Will in that station was the faint, general, and almost lost ideas he had of having once seen him act a part in one of his own comedies, wherein being present to personate a decrepit old man, he wore a long beard, and appeared so weak and drooping and unable to walk, that he was forced to be supported and carried by another person to a table, at which he was seated among some company who were eating, and one of them sang a song.
Or that passion to act a part that sometimes makes us do things finer than we are ourselves?
But he can act a part too--his one unchanging character--and as he holds the door open for this woman, fifty pairs of eyes, each fifty times sharper than Sir Leicester's pair, should find no flaw in him.