This document summarizes a petition filed in 1843 by Mrs. Katharine Mackenzie on behalf of her son Sir James Sutherland Mackenzie. Sir James had exhibited signs of mental derangement and was placed in an asylum. The petition requests that Alexander Stuart be appointed as curator bonis (property guardian) for Sir James, as his property and finances required management. It provides background on Sir James' condition, family details and certificates from doctors assessing his ongoing mental incapacity.