35, 109.) that is, before the reign of Richard I., although practice any house is an ancient messuage if it was erected before the time of living memory, and its origin cannot be proved to be modern.—Ancient lights. Lights or windows in a house, which have been used in their present state, without molestation or interruption, for twenty years, and upwards. To these the owner of the house has a right by prescription or occupancy, so that they cannot be obstructed or closed by the owner of the adjoining land which they may over-