It shall be lawful for the Commissioners of Her Majesty's Treasury, after the Appointment of such Surveyor General as aforesaid, to appoint a Person, being by Education and Profession a Land Surveyor, to be an Itinerant Surveyor of the Possessions and Land Revenues of the Crown, and to assign to such Itinerant Surveyor such Duties and Powers, to be exercised under the Control and Direction of the Surveyor General, in relation to the Management of the said Possessions aud Land Revenues, as such Commissioners may think fit; and such Salary shall be paid to such Itinerant Surveyor as may be from Time to Time appointed by the said Commissioners, and he shall be removable from such Office by the said Commissioners if they see fit.