Why does Mr. Brownlow want to include Mr. Grimwig in the plan? Who does Losberne want include in return?

Mr. Grimwig was included......

"I should like," he said, "to call in the aid of my friend Grimwig. He is a strange creature, but a shrewd one, and might prove of material assistance to us; I shold say that he was bred a lawyer, and quitted the Bar in disgust because he had only one brief and a motion of course, in twenty years, though whether that is a recommendation or not, you must determine for yourselves."

Losberne wanted to include Harry Maylie. Both men were included.