Examples of Open Arable Fields in cultivation at the present time are so rare that it is strange that those in the Isle of Portland in Dorset have been overlooked by every writer on this subject, This omission is probably due to the isolation of Portland, thrust, as it is, far out into the waters of the English Channel. Its isolation, also, is probably one reason why these open fields have survived, for Portland is a district of survivals. The Court Leet of its Royal Manor still exercises real authority, and Portlanders are tenacious of their ancient rights and customs. They tolerate but are not over-fond of ‘foreigners’ from the mainland and they sturdily resent outside interference and direction.