竊國者侯，竊鉤者誅

窃 = 切 + 穴 : The Queen of Hearts (qi) is stealing (窃) the cave paintings (穴) in the elevator's bathroom (e4) by cutting (切) them off the wall.

国 = 囗 + 玉 : Mnemonic symbol: a nation's flag. Let's say the Chinese flag.

In the observatory's kitchen (o2) Gitta Giraffe (gu) is practising her ballet performance. She got a whole crate (囗) full of jade bracelets (玉) and flags (国) and fixed one flag to each jade bracelet. This makes a perfect combination for throwing the ring with the flag waving behind it and catching the ring again after a few pirouettes.

者 = ⺹ + 日 : Mnemonic symbol: the sun (日) is wearing a crown (⺹). This reminds me of Louis XIV, le Roi Soleil, the Sun King, which will thus be the mnemonic symbol for 者. The crown (⺹) wearing sun (日), the Sun King (者) and James II of England (zh) are taking part in a writing contest in the elevator's living room (e3) to see who of them is the best author (作者).

侯 = 亻 + 矢 : The marquis and Rosa Luxemburg are throwing darts at a curling stone (which resembles the strokes above 失 and is held up by Hamlet) in the outhouse's kitchen. Since the curling stone is made of granite, there is no chance that one dart will ever stick to it.

钩 = 勾 + 钅 : Guy Fawkes (g) wants to break into the outhouse. In front of the outhouse (ou1) he draws (勾) a window catch (钩) onto the glass with a golden harpoon (钅) so he can open the window.