Forty images by James Gillray, a leading caricaturist of the late 1700s, were discovered recently by workers at the Ministry of Justice during an office move.
A museum spokesman said the album featured ”explicitly sexual, scatological and politically outrageous” subject matter.
David Pearson, an official in the MoJ’s Criminal Law Policy Unit, found the folio during an office move.
“The folio was carefully wrapped up alongside a collection of seized material that had been handed to the old obscene publications unit over the years,” he said.
“That material is fairly tame by today’s standards, but when I uncovered the folio it was clear that it was something a little out of the ordinary.