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 the subject, to endeavour to indicate how and where the different heavy guns were mounted; but some particulars as to the guns themselves can and should be attempted. In this we are assisted by the fact that several guns which went down in the above-mentioned Mary Rose in 1545, off Portsmouth, have been recovered, and are still in existence, and by the further fact that little change in the size and nature of ships' heavy guns took place during the sixteenth century. A table of the principal guns of that period, compiled from extant specimens, and from what appear to be the most trustworthy ancient authorities, is therefore appended: —