[Sir Charles Holroyd, English engraver, first Keeper of the Tate Gallery.] Autograph Letter Signed to 'Thomson'

1p., 12mo. In good condition, on lightly-aged paper. He writes to apologise that he 'cannot get away to see the Holbein' at the previously arranged time, because he has a meeting with 'my accounting officer'. He suggests an alternative time, and apologises 'heartily for my mistake'.