Even if he's undone the door, he may be in ambush.

We must hold on here till somebody comes.' Then Alice said, speaking chokily because she had not quite done crying-- 'Let's wave a flag.' By the most fortunate accident she had on one of her Sunday petticoats, though it was Monday.

This petticoat is white.

She tore it out at the gathers, and we tied it to Denny's stick, and took turns to wave it.

We had laughed at his carrying a stick before, but we were very sorry now that we had done so.
And the tin dish the Lent pie was baked in we polished with our handkerchiefs, and moved it about in the sun so that the sun might strike on it and signal our distress to some of the outlying farms.
This was perhaps the most dreadful adventure that had then ever happened to us.