* examine the window; take the HANDKERCHIEF (Z).

* Use the PLIERS to get the BLOODY NAIL (A) and take the RULER (B).

* Examine the fireplace; take the PARCHMENT (C).

* Examine the roll top desk and use the RULER on the lid (D).

* examine the opened desk and place the PARCHMENT on it to trigger a puzzle.

* Clear the board by matching available pairs.

* See screenshot for examples (E).

* Take the DECIPHERED PARCHMENT.

* Back out.

* Give the DECIPHERED PARCHMENT to Mr. LeGRrand (F).

* Pet Arthur the dog and he will be added to your toolbar (G), He will be able to assist you in sniffing items in your inventory that have a paw print.

* Go through the door on the right.