Morgan had a pass of the same sort.

The question to be determined was: What were "environs" and how far do they extend?
How far in safety would the word carry us forward?
On August 23 we set forth from Brussels in a taxicab to find out.

At Hal, where we intended to abandon the cab and continue on foot, we found out.

We were arrested by a smart and most intelligent-looking officer, who rode up to the side of the taxi and pointed an automatic at us.

We were innocently seated in a public cab, in a street crowded with civilians and the passing column of soldiers, and why any one should think he needed a gun only the German mind can explain.
Later, I found that all German officers introduced themselves and made requests gun in hand.