Clouds of Witness by Dorothy L Sayers

Drunk as a lord? As a class they are really very sober. Judge Cluer, in Court

While the Attorney-General was engaged in the ungrateful task of trying to obscure what was not only plain, but agreeable to everybody's feelings, Lord Peter hauled Parker off to a Lyons over the way, and listened, over an enormous dish of eggs and bacon, to a brief account of Mrs. Grimethorpe's dash to town, and a long one of Lady Mary's cross-examination.