Translations for composer in French

Here are paragraphs from public domain books translated:

My friend was an enthusiastic musician, being himself not only a very capable performer, but a composer of no ordinary merit. All the afternoon he sat in the stalls wrapped in the most perfect happiness, gently waving his long, thin fingers in time to the music, while his gently smiling face and his languid, dreamy eyes were as unlike those of Holmes, the sleuth-hound, Holmes the relentless, keen-witted, ready-handed criminal agent, as it was possible to conceive. In his singular character the dual nature alternately asserted itself, and his extreme exactness and astuteness represented, as I have often thought, the reaction against the poetic and contemplative mood which occasionally predominated in him. The swing of his nature took him from extreme languor to devouring energy; and, as I knew well, he was never so truly formidable as when, for days on end, he had been lounging in his arm-chair amid his improvisations and his black-letter editions. Then it was that the lust of the chase would suddenly come upon him, and that his brilliant reasoning power would rise to the level of intuition, until those who were unacquainted with his methods would look askance at him as on a man whose knowledge was not that of other mortals. When I saw him that afternoon so enwrapped in the music at St. James's Hall I felt that an evil time might be coming upon those whom he had set himself to hunt down.

Mon ami Sherlock Holmes n’était pas seulement un musicien enthousiaste, mais aussi un habile exécutant et un compositeur émérite. Il passa tout l’après-midi dans sa stalle, battant doucement la mesure de ses doigts longs et effilés et jouissant du bonheur le plus complet. Son visage s’épanouissait en un sourire béat et ses yeux devenaient langoureux et rêveurs ; il ne restait plus rien de Holmes le fin limier, de Holmes l’implacable agent criminel que son esprit vif et perçant plaçait au premier rang parmi les policiers. La dualité de nature de ce singulier personnage s’affirmait tour à tour. À mon avis, l’extrême exactitude de Holmes et son astuce n’étaient que la réaction contre cet état d’âme poétique et contemplatif qui tendait à le dominer ; mais, grâce à l’élasticité de sa nature, il passait rapidement d’une langueur extrême à une énergie dévorante. J’avais remarqué qu’il n’était jamais plus vraiment redoutable que lorsqu’il était resté plusieurs jours étendu dans son fauteuil, au milieu de ses improvisations et de ses éditions gothiques. Tout à coup la passion de la chasse le saisissait, et, telle était alors la puissance de son raisonnement que le public ignorant de sa méthode prenait pour des intuitions ce qui n’était que de simples déductions, se demandant où cet homme avait pu puiser une science si supérieure à celle de ses semblables. En le voyant, cet après-midi, absorbé par la musique à Saint-James’Hall, je prévoyais que les gens qu’il allait traquer passeraient un mauvais quart d’heure.

The Adventures of Sherlock Holmes, by Arthur Conan Doyle

Les Aventures de Sherlock Holmes, de Arthur Conan Doyle