Petition of the inhabitants of Antwerp, urging the opening of the Scheldt.--Remarks of M. Cerisier on the petition; true causes of the decline of the Austrian Low Countries, and of the prosperity of the Dutch Provinces; absurdity of the pretensions of the Austrian Provinces to the free navigation of the Scheldt; the other powers would oppose the measure. To the President of Congress. Amsterdam, June 12th, 1781, 49 Petition of the Deputies of Dort, Haerlem, Amsterdam, and Rotterdam, to the States of Holland and West Friesland, with a petition of the same to the States-General, praying for protection of the commerce to Surinam. To the President of Congress. Amsterdam, June 15th, 1781, 59 Arrival at the Hague of a courier from St Petersburg, supposed to bring despatches denying assistance from the armed neutrality.--Probable consequences.--Obstacles to an alliance between Holland and France. To the President of Congress. Amsterdam, June 23d, 1781, 60 Answer of Russia above referred to.--Remarks of Mr Adams on the answer.--America must not look to European negotiations for safety. To the President of Congress. Amsterdam, June 23d, 1781, 63 Advice of the Deputies of Zieriksee to the States of Zealand, complaining of the inactivity of the government. To the President of Congress. Amsterdam, June 26th, 1781, 67 The Emperor takes measures to revive commerce in the Austrian Low Countries; grants privileges to Nieuport; advantages of that city for foreign and domestic trade.--Great quantities of British manufactures are introduced into America in neutral bottoms and by clandestine channels. To the President of Congress. Amsterdam, June 26th, 1781, 69 The Regency of Amsterdam in an interview with the Stadtholder, charge the Duke of Brunswick with hostility to the welfare of the country, and devotion to the interests of England, and demand his dismission. To the President of Congress. Amsterdam, June 27th, 1781, 75 Major Jackson's services in the purchasing and shipping of goods for the United states. To the President of Congress. Amsterdam, June 29th, 1781, 76 The Duke of Brunswick's reply to the memorial of Amsterdam.