Here's a long excerpt from the article, which I highly recommend:
He was working at a feverish pace. Visitors to Barnhill recall the sound of his typewriter pounding away upstairs in his bedroom. Then, in November, tended by the faithful Avril, he collapsed with "inflammation of the lungs" and told Koestler that he was "very ill in bed". Just before Christmas, in a letter to an Observer colleague, he broke the news he had always dreaded. Finally he had been diagnosed with TB.
A few days later, writing to Astor from Hairmyres hospital, East Kilbride, Lanarkshire, he admitted: "I still feel deadly sick," and conceded that, when illness struck after the Corryvreckan whirlpool incident, "like a fool I decided not to go to a doctor - I wanted to get on with the book I was writing." In 1947 there was no cure for TB - doctors prescribed fresh air and a regular diet - but there was a new, experimental drug on the market, streptomycin. Astor arranged for a shipment to Hairmyres from the US.
Richard Blair believes that his father was given excessive doses of the new wonder drug. The side effects were horrific (throat ulcers, blisters in the mouth, hair loss, peeling skin and the disintegration of toe and fingernails) but in March 1948, after a three-month course, the TB symptoms had disappeared. "It's all over now, and evidently the drug has done its stuff," Orwell told his publisher. "It's rather like sinking the ship to get rid of the rats, but worth it if it works."
As he prepared to leave hospital Orwell received the letter from his publisher which, in hindsight, would be another nail in his coffin. "It really is rather important," wrote Warburg to his star author, "from the point of view of your literary career to get it [the new novel] by the end of the year and indeed earlier if possible."
Just when he should have been convalescing Orwell was back at Barnhill, deep into the revision of his manuscript, promising Warburg to deliver it in "early December", and coping with "filthy weather" on autumnal Jura. Early in October he confided to Astor: "I have got so used to writing in bed that I think I prefer it, though of course it's awkward to type there. I am just struggling with the last stages of this bloody book [which is] about the possible state of affairs if the atomic war isn't conclusive."
