She was locked in! Ray had done it, in fulfilment of her threat to "get even" with Patty.
The summons over there had been a blind, to trick her into the room, and now she was locked in! Patty smiled at the silly ruse.

The matter couldn't be serious,--she could certainly get out some way, and get home in time to don her costume and get to the circus, even if a little late.

Unwilling to cause unnecessary disturbance, she looked round the room to note the exits.

There was but one other door and that led to a dressing-room, which in turn had a door opening into a bathroom.

That was all.