Note 24 — IV.

The vine disease seems, however, to have been already prevalent in Madeira at a former period. In an old lease, referring to land or property in the west of the island, there is a clause to the effect that "In the event of the young grape being covered with mildew (mangra), the contract would be null and void." In Portugal also, the disease is said to have existed more than fifty years ago, though not to a great extent.