When Orwell was in the sanatorium in Kent, his wife's friend Lydia Jackson visited. He invited her for a walk and out of sight "an awkward situation arose." Jackson was to be the most critical of Orwell's marriage to Eileen O'Shaughnessy, but their later correspondence hints at a complicity. Eileen at the time was more concerned about Orwell's closeness to Brenda Salkield. Orwell had an affair with his secretary at "Tribune" which caused Eileen much distress, and others have been mooted. In a letter to Ann Popham he wrote: "I was sometimes unfaithful to Eileen, and I also treated her badly, and I think she treated me badly, too, at times, but it was a real marriage, in the sense that we had been through awful struggles together and she understood all about my work, etc." Similarly he suggested to Celia Kirwan that they had both been unfaithful. There are several testaments that it was a well-matched and happy marriage.