two heads are better than one

"Mr. Francis Osbaldistone is an innocent man, Rashleigh," said Miss Vernon, "and he demands an investigation of the charge against him, and I intend to support him in it."

"You do, my pretty cousin?—I should think, now, Mr. Francis Osbaldistone was likely to be as effectually, and rather more delicately, supported by my presence than by yours."

"Oh, certainly; but two heads are better than one, you know."