"A facsimile of the London, 1673 edition". "To which is added Duellun musicum by John Phillips". "Together with a letter from John Playford to Mr. T. Salmon". "In 1672 an extraordinary controversy commenced between Locke and Thomas Salmon, who had published An essay to the advancement of musick by casting away the perplexity of different cliffs ... Locke attacked the work in Observations upon a late book entitled An essay, etc. ... to which Salmon replied in A vindication of his essay ... and Locke in 1673 retorted in The present practice of music vindicated."--Grove, Dictionary of music and musicians. Includes a facsimile of the original title page.