The trial of Lieut. Col. Thomas, of the First Regiment of Foot-guards, on a charge exhibited by Lieut. Col. Cosmo Gordon : for aspersing his character, by accusing him of neglect of duty before the enemy, as commanding officer of the First Battalion of Guards, on the 23d of June, 1780, near Springfield, in the Jerseys : containing the whole proceedings of a general court-martial, held at New-York on the 16th of September last, and continued by several adjournments to the 26th of the same month.