“Then, upon trust , to lay out the residue of the said two several charges of 4000 l . and 2000 l . on my said nephew's estate, herein before particularly mentioned, with all such further or other sum or sums of money as shall be due to me, by mortgage, judgment, or upon any other security whatsoever, either in the purchase of lands of inheritance, or at interest, as my said trustees shall think most fit and proper , (but without any risk or hazard to my said trustees, or either of them;) and then, upon this further trust, to pay the rents of the said lands of inheritance, so to be purchased by my said trustees herein before named, or the interest money of the residue of the said charges of 4000 l . and 2000 l .; and also the interest and produce of all other sums of money as shall be due to me, in manner aforesaid, if the same shall