Paper, 'On certain definite integrals. No. 11' by W H L [William Henry Leighton] Russell Russell describes how the method by which 'integral 227' was obtained may be extended, presenting a series of equations. Annotations in ink. Subject: Mathematics Received 16 January 1882 [1883]. Read 25 January 1883. A version of this paper was published in volume 34 of the Proceedings of the Royal Society as 'On certain definite integrals. No. 11'. [1882-1883]