(d)who being jagirdar of the estate or any part of the estate in which the land occupied by him is situate, has continuously occupied the land for not less than twenty years, or, having been such jagirdar, occupied the land while he was jagirdar and has continuously, occupied it for not less than twenty years has a right of occupancy in the land so occupied unless, in the case of a tenant belonging to class specified in clause (c), the landlord proves that the tenant was settled on land previously cleared and brought under cultivation by, or at the expense of, the founder.