This is a decent round barrow, very nicely preserved and in a very prominent position. Topped by trees and easily visible from the minor road running alongside, this is one of the best examples of a round barrow along the western edge of the Cotswolds.
[The OS 1:25000 shows another round barrow a couple of hundred yards to the south-east (on Pegglesworth Hill at SP00351779), but a quick visit makes it look like it may have been ploughed out of existence. According to Darvill and Grinsell's "Gloucestershire Barrows: Supplement 1961-1988" it was only 0.4m high in 1980, so it's no real surprise. There is a mound in the field with a reservoir tank inserted into the top, but not in quite the position shown on the OS.]
The barrow appears to have had the name since at least 1777, when it was marked on Taylor's Map of Gloucester as "Paul Aposd".
"It has been suggested that an epistle was read there at the beating of the parish bounds, which run close by. In the mid 19th century, however, the name 'Paul and the Epistles' was sometimes used and was said to refer to the number of trees."