two questions about calendras cistern

[amievil?]

first- in the art collectors house(lord A.) there are two chests i simply cant find the keys for. are these chests openable and if so how?

second and more important, after grabbing the dead guys head he wants me to find the rest of him, i need to know the locations of the body parts becuase i hate scavenger hunts. ive been all over this level, from the very bottoms to the very tops and havent found one body part.... help other than those two ive figured out everything else, only objectives left to complete are getting the relic, getting the body parts, and going to mercedes apt which i can do all those pretty well i think. i just dont have time for a scavenger hunt and the chests have got me curious