Latin. There is only prescription in so far as there has been possession. The extent of a servitude constituted by grant, is regulated by the express terms of that grant although partial possession only may be given, so that the dominant owner may exercise his right to its full extent when he thinks fit. But a servitude acquired by prescription is limited to the use or possession which the acquirer had ; his possession affords the criterion by which to judge of the measure of his right. The same rule applies where one acquires by possession a piece of ground lying contiguous to his property, as a pertinent to his lands: his prescriptive right only covers that which he has possessed as a pertinent.