Rimsky-Korsakov and Borodin soon became intimate, notwithstanding the ten years difference in their ages. The former gives an interesting picture of the composer of _Prince Igor_, whose life was divided between chemistry and music, to both of which he was sincerely attached. "I often found him at work in his laboratory," writes Rimsky-Korsakov, "which communicated directly with his dwelling. When he was seated before his retorts, which were filled with colourless gases of some kind, forcing them by means of tubes from one vessel to another, I used to tell him he was spending his time in pouring water into a sieve. As soon as he was free he would take me to his livingrooms and there we occupied ourselves with music and conversation, in the midst of which Borodin would rush off to the laboratory to make sure that nothing was burning or boiling over, making the corridor ring as he went with some extraordinary passage of ninths or seconds. Then back again for more music and talk." Borodin's life, between his scientific work, his constant attendance at all kinds of boards and committee meetings,[32] and his musical interests, was strenuous beyond description. Rimsky-Korsakov, who grudged his great gifts to anything but music, says: "My heart is torn when I look at his life, exhausted by his continual self-sacrifice." He was endowed with great physical endurance and was utterly careless of his health. Sometimes he would dine twice in one day, if he chanced to call upon friends at mealtimes. On other occasions he would only remember at 9 p.m. that he had forgotten to take any food at all during the day. The hospitable board of the Borodins was generally besieged and stormed by cats, who sat on the table and helped themselves as they pleased, while their complacent owners related to their human guests the chief events in the biography of their feline _convives_. Borodin's wife was a woman of culture, and an accomplished pianist, who had profound faith in her husband's genius. Their married life was spoiled only by her failing health, for she suffered terribly from asthma and was obliged to spend most of the winter months in the drier air of Moscow, which meant long periods of involuntary separation from her husband.