"I'll give them five minutes before I start scrying," Strange points out, as if it's the most obvious thing in the world. "Delta does have water I can use."

As he talks, he gesture in the vague direction of the water feature. He trusts Childermass to get people back to where they're going. But at the same time, there's so many unknowns in this situation that Strange doesn't know what sort of trouble Childermass might face getting back here.