Of the Canada expedition, in its combined movements by the Kennebec and Lake Champlain, the authorities for detail may well be reserved for later notes (G and H), but for comprehensive treatment references may be made to the general historians and a few special monographs. As respects the campaign in general, the only considerable special study is Charles Henry Jones's _History of the Campaign for the Conquest of Canada in_ 1776 (Philad., 1882). The book does not profess, however, to follow the movements before the death of Montgomery, nor to touch at all the coöperating column of Arnold before it had united with the other. A principal interest of its writer is, furthermore, to chronicle the share of Pennsylvanians in the campaign. The study is therefore but an imperfect one, and the author gives the student no assistance in indicating his sources. The reader most necessarily have recourse, then, for a survey of the whole campaign, to such general works as Bancroft's _United States_ (vol. viii.), Carrington's _Battles_ (p. 122), and other comprehensive and biographical works.[516] The political aspects of the movement on Canada arise in the main from the mission of the Commissioners of Congress to the army, and their efforts to affect the sympathies of the Canadians. The sources of this matter are also traced in a subsequent note.[517] [Illustration] NOTES. =A.= LEXINGTON AND CONCORD.—The details of Revere's connection with the events of the 18th and 19th April are not altogether without dispute. Revere's own narrative was not written till 1798,[518] and was printed in the _Mass. Hist. Soc. Collections_, vol. v., but not so accurately as to preclude the advisability of reprinting it in the same society's _Proceedings_, Nov., 1878. Richard Devens's nearly contemporary account of the signal lanterns is printed in Frothingham's _Siege of Boston_, p. 57.[519] The traditional story of the other messenger of that eventful night is told in H. W. Holland's _William Dawes and his ride with Paul Revere_.[520] In a book which was published at Boston in 1873 as _Historic Fields and Mansions of Middlesex_, but whose title in a second edition, in 1876, reads _Old Landmarks and Historic Fields of Middlesex_, Mr. Samuel Adams Drake follows (ch. xvi.-xviii.) the route of the British troops from Lechmere Point to Concord and back to Charlestown, pointing out the localities of signal events in the day's course.