An act to enable George Keith, late Earl Marischall, to sue or maintain any Action or Suit, notwithstanding his Attainder, and to remove any Dissability in him, by Reason of his said Attainder, to take or inherit any real or personal Estate that may or shall hereafter descend or come to him, or which he was entitled unto, in Reversion or Remainder, before his Attainder.