Johnstone's interest in music was becoming more and more intense. In the intervals of his school work he composed a Gavotte which had a quaint origin. He was one day in a music publisher's shop in Edinburgh, when he saw a gavotte on the counter which had won a prize of £5 or £10 offered by the firm for the best composition in gavotte form submitted to them. "And is this your prize gavotte?" said Johnstone, "Well, if I couldn't compose a better gavotte than that in the time it takes to write it down I should think _even_ worse of myself than I do." "Why then," said the representative of the firm, "go home and compose your gavotte, we will publish it if we take it and give you the same money as this prize-winner got." Johnstone went home and composed it, and the firm carried out their promise. His few compositions were nearly always actually produced and completed under some sudden pressure from outside. Left to himself, his critical impulse was always stronger than his productive; he became dissatisfied and dropped the thing he was working at. His friend, the well-known singer, Fritz Hedmondt, having obtained from him a promise to arrange a certain song, let matters drop until the concert date was fixed and the programmes printed with the song announced "arranged by Mr. Arthur Johnstone." He then forwarded the programme to Johnstone with the observation that, of course, the thing had to be done. And it was done, in twenty-four hours, and was a beautiful and original bit of harmonization. He also set several songs, which, like the gavotte, met with the approval of Prof. F. Niecks, and were the main subjects of a fairly regular correspondence with Vantyn. In one of these letters he gives an appreciation of the pianoforte piece he most admired. "About Schumann's Etudes Symphoniques I can only say this: For a long time past I have privately held the opinion that the work is on the whole, the finest composition for pianoforte solo in existence. This will no doubt seem to you exaggerated, but such is my feeling about it. The extraordinary wealth of imaginative beauty in those variations I believe to be quite without parallel. Just think of that last variation before the finale. There is nothing else in music which bears even the faintest resemblance to it." Every summer he spent several weeks on the continent, and it was on one of these visits that he first made the acquaintance of Nietzsche's philosophy, which was then hardly known in England though beginning to be talked of in Scotland under the influence of Dr. Tille of Glasgow. In December, 1903, he writes to Miss Sellar:-- "The author of _Schopenhauer als Erzicher_ is Friedrich Nietzsche. I suppose you will no more agree with the point of view than with Sudermann's; for, in fact, the point of view of the two writers is practically identical, but I do not think you can fail to recognise the extraordinary originality and force, and, above all, the magnificent honesty of Nietzsche.