Whereas I have purchased of Thomas Lincoln and his wife, the North East fourth of the South East quarter of Section Twentyone in Township Eleven North of Range Nine East, for which I have paid them the sum of two hundred dollars, and have taken their deed of conveyance for the same, with a reservation of a life estate therein to them and the survivor of them. Now I bind myself, my heirs and assigns, to convey said tract of land to John D. Johnston, or his heirs, at any time after the death of the survivor of the said Thomas Lincoln & wife, provided he shall pay me, my heirs or assigns, the said sum of two hundred dollars, at any time within one year after the death of the survivor of the said Thomas Lincoln & wife, and the same may be paid without interest except after the death of the survivor as aforesaid. 
Witness my hand and seal this 25th. of October A.D. 1841.
A. LINCOLN (SEAL)