Translations for mounted in French

Here are paragraphs from public domain books translated:

A steep curve of heath-clad land, an outlying spur of the moor, lay in front of us. On the summit, hard and clear like an equestrian statue upon its pedestal, was a mounted soldier, dark and stern, his rifle poised ready over his forearm. He was watching the road along which we travelled.	Une petite colline, une sorte d’éperon formé par la lande et s’avançant dans la vallée, se dressait devant nous. Sur la cime, semblable à une statue équestre, nous aperçûmes un soldat à cheval, le fusil appuyé sur son bras gauche, prêt à faire feu. Il gardait la route par laquelle nous arrivions.
The Hound of the Baskervilles, by Arthur Conan Doyle	Le Chien des Baskerville, de Arthur Conan Doyle