This is from Page's _Plan of the Town of Boston_, published in London in 1777, and is accompanied by the following Key:—_a_, redoubt; _b_, block-house for cannon; _c_, six 24-pounders, 2 royals; _d_, four 9-pounders; _e_, six 24-pounders; _f_, left bastion; _g_, right bastion; _h_, _h_, guard-houses; _i_, _i_, traverses; _k_, _k_, magazines; _l_, _l_, abattis; _m_, _m_, _m_, routes-du-pols; _n_, block-house for musketry; _o_, floating battery, 2 guns; _p_, _p_, fleches, 1 sub. and 20 men. The building beyond the outer lines and near the edge of the upland is Brown's house, the scene of skirmishes during the siege (_Mem. Hist. of Boston_, iii. 80; Heath's _Memoirs_). The narrowest part of the neck was at the present Dover Street where it intersects Washington Street. The foundations of the main works at this point were laid bare in digging a drain in March, 1860. The outer works were just within Blackstone and Franklin squares. There are views of these lines in the Faden Collection in the library of Congress, dated August, 1775, probably the original of the engraved views which accompany Des Barres' coast survey, and of which there are reproductions in the _Mem. Hist. of Boston_, iii. 80. Cf. also Frothingham's _Siege_, p. 315. The same Faden Collection has a pen-and-ink plan of the lines, dated Aug., 1775 (no. 37 of the _Catal._). During the summer of 1775, John Trumbull, then an aid to General Spencer, crawled up, under cover of the tall grass, near enough to the British lines to sketch them; but a continuance of the hazardous exploit was soon rendered unnecessary by the desertion of a British artilleryman, who brought with him a rude plan of the entire work. So Trumbull says in his _Autobiography_, p. 22. Washington, on comparing this surreptitious sketch with the deserter's plan, found them so nearly to correspond that Trumbull thinks his own future promotion probably arose from it. Trumbull's sketch and the memorandum of the deserter "from the Welsh fusileers" seem to have been the basis of a careful drawing of the British lines, prepared apparently at headquarters in Cambridge, as it bears the handwriting of Washington's aid, Thomas Mifflin, an explanatory table of the armament in the works. This found its way into that portion of the Papers of Arthur Lee which went to the Amer. Philosophical Society in Philadelphia, and from it a reduced heliotype is given in the _Mem. Hist. of Boston_, iii. p. 80. Washington sent a copy of the plan, nearly duplicate, to Congress, and this is given in Force's _Amer. Archives_, 4th ser., i. p. 29, and is reproduced on a smaller scale in Wheildon's _Siege and Evacuation of Boston_, p. 34. (Cf. _Mass. Hist. Soc. Proc._, April, 1879, p. 62.) There are two other American drawings of the lines, of less importance. One is in the _Pennsylvania Magazine_ for Aug., 1775, and is called _An exact plan of Gen. Gage's lines on Boston Neck in America, July 31, 1775_.