“And in case it shall happen any other heir male of my body to succeed to both the said estates; in that case, the foresaid estate of Balquhain shall fall and belong to the next heir male to be procreate of my body of this or any other marriage, which failing, to the subsequent heirs of tailzie aforesaid, to whom the said heir male , and the heirs male of his body who shall succeed to the German property, shall be obliged to dispone and resign the foresaid lands of Balquhain; and the same shall from henceforth be redeemable by the other, and next heirs