Observations on the twelfth article of war [electronic resource] : Wherein the nature of negligence, cowardice, and disaffection, is discussed; the respective guilt of each ascertained on principles of natural equity; and the difference between error of judgment and negligence clearly stated: necessary to be perused by all sea-officers, especially those of court-maritals, and exemplified in the case of the Late Admiral Byng, which is distinctly stated; and for the use of readers in general, in popular language, free from all embarassment of sea-terms. In a letter to the president of the late court-martial. By a Plain Man