Describe Swami's friend Samuel.

From the text:

The fourth friend was Samuel known as the 'Pea' on account of his size. There was nothing outstanding about him. He was just ordinary, no outstanding
virtue of muscle or intellect. He was as bad in Arithmetic as Swaminathan was. He was as apprehensive, weak, and nervous, about things as Swaminathan was. The bond between them was laughter. They were able to see together the same absurdities and incongruities in things. The most trivial and unnoticeable thing to others would tickle them to death.