Letter from Donald McLean, Land Commissioner, to the Honble, the Colonial Secretary, dated 15th. July 1850. relative to the Interior boundaries of the Wangaehu and Rangitikei purchases. Wanganui, 15th. July 1850 Sir, As various differences may hereafter arise from the undefined state of the Interior boundary of the Rangitikei and Wangaehu purchases, - I have the honor to acquaint you for the information of His Excellency, the Lieutenant Governor, that I am desirous, and shall be prepared, with the Native Chiefs, and Mr. Park, on Monday next, to commence cutting