As the payment involved was £22 - this website should show you how much this was worth in 1858

? William DAVIS - what was his estate worth

http://www.measuringworth.com/ukcompare/index.php

Looking at the above website : £22 . You would need to have £1,932.00 today for the equivalent purchasing power.

? No idea what Gale Rent costs were in the mid 19th century.

Looking at the Gloucestershire Records Office - Gales were a plot of land used by freeminers

Freeminers

http://www.gloucestershire.gov.uk/archives/CHttpHandler.ashx?id=56536&p=0