Dr. Johnson’s wigs were in general very shabby, and their fore-parts
were burned away by the near approach of the candle, which his
short-sightedness rendered necessary in reading. At Streatham, Mr.
Thrale’s butler always had a wig ready; and as Johnson passed from the
drawing-room, when dinner was announced, the servant would remove the
ordinary wig, and replace it with the newer one; and this ludicrous
ceremony was performed every day.--_Croker._