You are doing well with difficult names. All the Cowleys obviously have been mistranscribed as Conley.
Most of the farm names you mention are in the southern
part of Lonan along the electric railway line or Douglas
Road ?? but can't find names on OS map.
Ballacarrooin will have been a hill/mountain farm high on Slieau Meayll up above the B12 from Laxey to Creg-
ny- Baa. It will be a ruined tholtan now without a lane.
Harris Terrace is an old terrace [ nearMNH] in Douglas
& so either the registrar made an error then or NOW.