The missing stairs baffled Clary. What did vampires have against stairs? -Clary, pg.266-

I think you ought to let me take poor Tessa into town to get some new clothes. Otherwise, the first time she takes a deep breath, that dress will fall right off her." Will looked interested. "I think she should try that out now and see what happens.

In Paris one could have the eyes of a cat (as he did) and tell people it was a trick of fashion.

Alec looked merely irritated by this comment. "The only way you could raise enough money to hire Magnus by selling lemonade is if you put meth in it.

Wallowing was for elephants, depressing people and depressing elephants

The grandeur of the Institute never failed to impress Magnus - the way it towered high and mighty above everything else, timeless and unmoving in its Gothic disapproval of all that was modern and changeable.

I would leave at once, but it would be cruel to abandon a lady in a foreign land with a maniac.