you have it (I think) on CD - Woods atlas use the numbers on map (not there for decoration) with the associated table of owners - if there is a 'T' suffix to number then the Manx Museum will (apart from Rushen where the plans are lost) hold a tithe plan from the early 1840's which will usually show considerable detail - the 1868 OS 1:2500 sheets will show the area but I don't have the sheets covering the Hiberian but a number of others are on my CD

As I'm now tired of pointing out the IoM Gov Public Rights of way map (on paper approx 2.5in to 1mile gives excellent coverage tho does not delineate individual farms (after all farmers have been known to sell/exchange field etc) - available from Museum - shop@mnh.gov.im

However I hope to be on the boat in the morning tomorrow and not back on Island for at least a couple of weeks but the Museum might supply (at a price ) copies of the plans