Ah, that one. [Sabriel drinks the last dregs of her tea, and circles the remaining symbols.] That one uses drawn signs.

[Sabriel carefully positions her hands above the teacup and then traces out the marks. Unfortunately, while the teacup is filled to the brim, a a great deal of water ends up on the table, and Sabriel blushes.]

It's easier when there's more water in the air, but it will work even if the air is fairly dry.]