By this time Murray was primarily interested in languages and etymology, the origin of words. Some idea of the depth and range of his linguistic erudition may be gained from a letter of application he wrote to Thomas Watts, Keeper of Printed Books at the British Museum, in which he claimed an 'intimate acquaintance' with Italian, French, Catalan, Spanish and Latin, and 'to a lesser degree' Portuguese, Vaudois, Provençal & various dialects'. In addition, he was 'tolerably familiar' with Dutch, German and Danish. His studies of Anglo-Saxon and Mœso-Gothic had been 'much closer', he knew 'a little of the Celtic' and was at the time 'engaged with the Slavonic, having obtained a useful knowledge of the Russian'. He had 'sufficient knowledge of Hebrew and Syriac to read and cite the Old Testament and Peshito' and to a lesser degree he knew Aramaic, Arabic, Coptic and Phoenician. However, he did not get the job.