Everything you need is above. The cache, a camouflaged 2l lock'n'lock box, is not at the published co-ordinates but is within 1 mile. You can check your answers for this puzzle on Geochecker.com.
René Descartes (1596 – 1650) was a French philosopher, mathematician, scientist, and writer. He gave his name to the philosophical idea of Cartesian Dualism; his principle "I think, therefore I am" is widely recognised; he also made significant contributions to the field of optics.
Original contents included an unactivated East Anglia Cachers geocoin as a FTF prize.
FTF: bobgeorge