EXAMPLES FROM THE WEB FOR COUNTERSIGN
“Advance, friend, and give the countersign,” was the command.
Every now and then, when challenged, she mechanically repeated the countersign.
Going up to the sentinel, I told him who we were, and that we had not the countersign.
Their concluding words had evidently been some form of sign and countersign.
We had no countersign, but I immediately ran the boat ashore, and we landed.
Advance, friend in a tremendous hurry, and give the countersign.
And what to these ministers do but countersign the signature of the king?
If no countersign be used, the rules for challenging are the same.
“Give the countersign,” said Travis with ill-concealed irritation.
Now I did not know the countersign, and I had to tell him so.