The Mersiche Brook flows from the Black Penny Wall Well to Cannop Ponds.
The name is probably Anglo-Saxon meaning 'boundary Stream'.
The meandering of the brook is typical of a stream flowing over a fairly flat floor to a valley.
The above text is from:
"Boy's Grave and Forest Trail"
B. V. Cave of the Wilderness Wildlife Centre Mitcheldean
M.J. Dunn, Forest Warden
The Forestry Commission © 1974