Somewhat later he was appointed Organist of the Chapel at Somerset House; this Chapel was part of the establishment of Queen Catherine, the Queen of Charles II, who throughout her life remained a Roman Catholic. It would appear from Roger North that Locke was not altogether a success in this position. He says: "Locke was organist of Somerset House Chapel as long as he lived, but the Italian Masters that {90} served there did not approve of his manner of play; but must be attended by more polite hands, and one while, one Signor Baptista Sabancino, and afterwards Signor Baptista Draghi used the Great Organ, and Locke (who must not be turned out of his place, nor the execution) had a small Chamber Organ by, on which he performed with them the same Services." This seems a somewhat humbling position for such a man--and one wonders what he said about it! Another sharp controversy he took part in was in answer to Mr Thomas Salmon, M.A., of Trinity College, Oxford, who had written and published _An Essay to the Advancement of Music by casting away the perplexity of different cliffs and writing all sorts of music in one universal character_. The desire to simplify musical signs seems to have been an old theme and one that gave rise to a fierce controversy between Matthew Locke and Mr Salmon. It is only fair to say that Mr Salmon was not over judicious in his method of recommending his scheme. He seems to have purposely hit out at music masters (of whom Locke was one of the most eminent), and suggested that their opposition to his ideas sprang from the sordid desire to make as much as they {91} could out of their pupils, by keeping them as long as possible under tuition. Matthew Locke replied to this in a treatise entitled _The Present Practice of Musick vindicated against the exceptions and new way of attaining music lately published by Thomas Salmon, M.A_. The controversy was very warm. You shall hear a short address "To the Reader" which will give some idea of the style of discussion Locke adopted. Though I may without scruple aver that nothing has done Mr. Salmon more kindness than that his books have had the honour to be answered, yet I have been forced to afford him this favour rather to chastise the Reproaches which he hath thrown upon the most eminent Professors of Musick than for anything of learning that I found in him. Those gentlemen he accused of ignorance for not embracing his illiterate absurdities for which it was necessary to bring him to the "Bar of Reason" to do him that justice which his follies merited. Though for the fame he gets by this, I shall not much envy him, with whom it will fare as with common criminals, who are seldom talked of above two or three days after execution. A little farther on he gets angry and says: