Moral gallantry : a discourse wherein the author endeavours to prove that point of honour (abstracting from all other ties) obliges men to be vertuous, and that there is nothing so mean (or unworthy of a gentleman) as vice : to which is added a consolation against calumnies, shewing how to bear them easily and pleasantly : written in return to a person of honour, and at his desire subjoyn'd to this discourse, because of the contingency of the subject / by Sir George Mackenzie ...