Thanks to the Campden & District Historical and Archaeological Society (CADHAS) for providing the following history:
The inscription refers to the Rev Leland Noel (1797-1870), the 15th child and 9th son of Gerard and Diana Noel. The head of the Noel family was the Earl of Gainsborough, who also had estates in Rutland. The family were great local benefactors, and the name keeps cropping up in Chipping Campden. Leland studied at Westminster School, London, and later at Trinity College, Cambridge. He became Rector of Chipping Campden in 1826 until he moved to Rutland in 1832.
In 1870, the then Canon wrote "About the last act which the beloved Vicar performed in this parish was the erection, in connection with his early friend the present Vicar, of the iron pump which stands under the shade of the old Chestnut in Laseborn [now Leasebourne/ Leysbourne]".
In 1932, the Evesham Journal carried an article which stated "This particular pump, which is of pure Adam design...is one of the earliest examples of the time when art was first brought to bear on objects of public utility". It was originally placed by the Cattlebrook pool and open stream, which ran along Leysbourne, but moved when the chestnut tree fell down in 1932 and hit a showman's caravan during the Scuttlebrook Fair. Unable to find a more suitable site, the pump was replaced in its original and present position when the unsanitary pool was filled in and the stream diverted.
The biblical reference is: "Jesus said (whilst on his way from Judea to Galilee) to her [a woman of Samaria] 'everyone who drinks of this water [the deep well of Jacob in the field he gave to his son Joseph by the city of Sychar] will thirst again, but who ever drinks of the water I shall give him will never thirst; the water that I shall give him will become in him a spring of water welling up eternal life'".