Barchester Towers by Anthony Trollope

All this time things were going somewhat uneasily at the palace. The hint or two which Mr. Slope had given was by no means thrown away upon the bishop. He had a feeling that if he ever meant to oppose the now almost unendurable despotism of his wife, he must lose no further time in doing so; that if he ever meant to be himself master in his own diocese, let alone his own house, he should begin at once. It would have been easier to have done so from the day of his consecration than now, but easier now than when Mrs. Proudie should have succeeded in thoroughly mastering the diocesan details. Then the proffered assistance of Mr. Slope was a great thing for him, a most unexpected and invaluable aid. Hitherto he had looked on the two as allied forces and had considered that, as allies, they were impregnable. He had begun to believe that his only chance of escape would be by the advancement of Mr. Slope to some distant and rich preferment.

But now it seemed that one of his enemies, certainly the least potent of them, but nevertheless one very important, was willing to desert his own camp. Assisted by Mr. Slope what might he not do? He walked up and down his little study, almost thinking that the time might come when he would be able to appropriate to his own use the big room upstairs in which his predecessor had always sat.