At all costs she must be prevented from giving that information.

At all risks, therefore, the warning telegram must be sent to Harry Wethermill." Ricardo recognised the force of the argument.
"If only you had heard of the telegram yesterday in time!" he cried.
"Ah, yes!" Hanaud agreed.

"But it was only sent off at a quarter to one.

It was delivered to Wethermill and a copy was sent to the Prefecture, but the telegram was delivered first." "When was it delivered to Wethermill ?" asked Ricardo.
"At three.

We had already left for the station.