It is not difficult to disguise yourself

Stanislavsky, from Building a Character:

Externally it is not difficult to disguise yourself. I once had something of the sort happen to me; I had an acquaintance I knew very well. He talked with a deep bass voice, wore his hair long, had a heavy beard and bushy mustache. Suddenly he had his hair cut and shaved off his whiskers. From underneath there emerged rather small features, a receding chin, and ears that stuck out. I met him in this new guise at a family dinner, at the house of some friends. We sat across the table from one another and carried on a conversation. Whom does he remind me of? I kept saying to myself, never suspecting that he was reminding me of himself. In order to disguise his bass voice my friend used only high tones in speaking. This went on for half the meal and I talked with him as though he were a stranger.

And here is another case. A very beautiful woman I knew was stung in the mouth by a bee. Her lip was swollen and her whole mouth was distorted. This not only changed her appearance so as to make her unrecognizable, it also altered her pronunciation. I met her accidentally and talked to her for several minutes before I realized she was one of my close friends (6).