FACSIMILE OF A PROCLAMATION BY SIR WILLIAM HOWE; All intrepid able bodied heroes, who are willing to serve his Majesty King George the Third, in Defence of their Country, Laws and Constitution, against the arbitrary Usurpations of tyrannical Congress, have now not only an Opportunity of manifesting their Spirit, by assisting in reducing to Obedience their too-long deluded Countrymen, but also of acquiring the polite Accomplishments of a Soldier, by serving only two Years, or during the present R