At one of the entertainments given at the Province House, during the latter part of the siege of Boston, there passed a scene which has never yet been satisfactorily explained. The officers of the British army, and the loyal gentry of the province, most of whom were collected within the beleaguered town, had been invited to a masked ball; for it was the policy of Sir William Howe to hide the distress and danger of the period, and the desperate aspect of the siege, under an ostentation of festivity. The spectacle of this evening, if the oldest members of the provincial court circle might be believed, was the most gay and gorgeous affair that had occurred in the annals of the government. The brilliantly-lighted apartments were thronged with figures that seemed to have stepped from the dark canvas of historic portraits, or to have flitted forth from the magic pages of romance, or at least to have flown hither from one of the London theatres, without a change of garments. Steeled knights of the Conquest, bearded statesmen of Queen Elizabeth, and high-ruffled ladies of her court, were mingled with characters of comedy, such as a party-colored Merry Andrew, jingling his cap and bells; a Falstaff, almost as provocative of laughter as his prototype; and a Don Quixote, with a bean pole for a lance, and a pot lid for a shield. But the broadest merriment was excited by a group of figures ridiculously dressed in old regimentals, which seemed to have been purchased at a military rag fair, or pilfered from some receptacle of the cast-off clothes of both the French and British armies. Portions of their attire had probably been worn at the siege of Louisburg, and the coats of most recent cut might have been rent and tattered by sword, ball, or bayonet, as long ago as Wolfe's victory. One of these worthies--a tall, lank figure, brandishing a rusty sword of immense longitude--purported to be no less a personage than General George Washington; and the other principal officers of the American army, such as Gates, Lee, Putnam, Schuyler, Ward and Heath, were represented by similar scarecrows. An interview in the mock heroic style, between the rebel warriors and the British commander-in-chief, was received with immense applause, which came loudest of all from the loyalists of the colony. There was one of the guests, however, who stood apart, eyeing these antics sternly and scornfully, at once with a frown and a bitter smile.