A treatise upon the useful science of defence : connecting the small and back-sword, and shewing the affinity between them : likewise endeavouring to weed the art of those superfluous, unmeaning practices which over-run it, and choke the true principles, by reducing it to a narrow compass, and supporting it with mathematical proofs : also an examination into the performances of the most noted masters of the back-sword ... : with some observations upon boxing, and the characters of the most able boxers within the author's time /