I have measured the routes of the various detachments and am enabled to give them as follows, in each case of Smith's force from the shore of Charles River in Cambridge, out to Concord and back to the shore of Charles River in Charlestown. The route of Percy's force was from School Street, Boston, out through Roxbury, etc., to the High School in Lexington, and return to the shore of Charles River, in Charlestown. My cyclometer is divided into eighty-eight fractions of a mile, each one of sixty feet.

Three companies under Capt. Lawrence Parsons to the home of Col. Barrett, beyond North Bridge, Concord, 39 ⁷¹/₈₈ miles.

Three companies under Capt. Walter Sloane Lawrie to the North Bridge, Concord, 36 ¹¹/₈₈ miles.

Force of about one hundred men under Capt. Mundy Pole, to the South Bridge, Concord, 36 ⁴⁰/₈₈ mile.

Main division under Lieut.-Col. Smith, to Concord village, 34 ⁵⁵/₈₈ miles.

Earl Percy's reinforcement, to the High School in Lexington, 25 ^70½/₈₈ miles.

That of his baggage train captured and destroyed in Arlington, 11 ^39?/₈₈ miles.