From 1911 he collaborated with Littlewood, and from 1914 with Ramanujan.
His autobiography, A Mathematician's Apology, was published in 1941.
... is 2.79. In the town the population is spread out with 18.5% under the age of 18, 4.4% from 18 to 24, 20.6% from 25 to 44, 26.3% from 45 to 64, and 30.2% who are 65 ...