"But friend, I know something too of the game of keeping them indoor."—Who said this and to whom? Bring out the context.

Answer: In Rabindranath Tagore's play The Post Office Gaffer said this to Madhav.

       Madhav adopted a boy named Amal. Amal was suffering from a chronicle disease and he was advised not to be out of the room by the village doctor. Once, Gaffer visited Madhab's house. Madhav became very afraid of him because he used to tempt children to go outside. When Madhav expressed his concern, Gaffer told that quoted line and informed Madhav that he also knew the method to keep children indoor.