An Account of the secret services of Monsieur de Vernay, the French minister at Ratisbonne to Count Teckeley [electronic resource] : as they pass'd by way of letter, with the cypher and key taken from the original, printed in French at Ratisbonne : together with the speech and memorial of the imperial minister Zorowiski, deliver'd to the King of Poland : to which is added Mercurius panegyricus.