It became a heritable post in the hands of the Earls of Sutherland until 1747, when it reverted, in combination with Caithness, to being a Royal appointment, usually for life.
Below is an instruction that describes a task, paired with an input that provides further context. Write a response that appropriately completes the request. ### Instruction: List the MITRE techniques contained in the text. ### Input: It became a heritable post in the hands of the Earls of Sutherland until 1747, when it reverted, in combination with Caithness, to being a Royal appointment, usually for life. ### Response: .