Ataan finds that most of the finery in the home is missing. The only thing remaining of real value is the dead wife's jewelry and personal affects. There are a few paintings missing from the walls (a faint outline where they were), and other such. Rifling through his effects you'll find receipts for purchases of chemicals and unguents and odd spices and powders. Clearly he had been liquidating his assets to pay for his horrific experiments. His purse contains a 100 quid.
The wife is a mismatch of pieces from several women, and the house smells like putrefying death and decay.
You gather all of the notes and easily portable chemicals, reagents and what not, basically everything that he used in his experiments, and stuff it into a sturdy bag.
Anything else you want to take beside the money and the evil stuff?