“For the benefit of the land hereby conveyed and so as to bind the Vendor’s adjoining land on the South East thereof the Vendor hereby covenants with the Purchaser and the persons deriving title under him that the Vendor will not at any time hereafter erect or allow to be erected any residence or manufactory on the Vendor’s said adjoining land on the South East but this shall not preclude the erection of a private garage hen houses or other erections of a similar character.”