He then handed her in, Maria followed, and the door was on the point of being closed, when he suddenly reminded them, with some consternation, that they had hitherto forgotten to leave any message for the ladies at Rosings.
There are no more uses of "consternation" in the book.
Show samples from other sources
With a look of consternation, her teacher asked if anyone had done the reading.
He was a natural athlete, but to the coaches consternation, he tended to forget the play in the heat of the moment.