ART - SISLEY Alfred (1839 - 1899) - Autograph letter signed

Autograph letter signed by the British impressionist painter. Sisley addresses Monsieur de Bellio, asking for medical advice: "...Que dois-je donner à mon garçon qui a depuis quelque jours des hémorragies nasale fréquents et assez abondantes?...". Bellio was an early friend and collector of the Impressionist group. 2 pp. In-8.