What is "accessorily"

Usage examples of "accessorily".

Sir John Fenwick, Smith, and Cook, to say nothing of the corroborative evidence of Goodman, establish beyond doubt that you were accessorily, though perhaps not actively, guilty of high treason--at this period, I say, there can be little doubt that if you were brought to trial--that is, in the course of next week, as I have heard it rumoured--the result would be fatal, such, in short, as we should all deplore.