He offered both his hand and an official-looking envelope.

Glancing in a box that bore the letter "C," he saw a long, official-looking envelope and asked for it.

Yaelu yanked an official-looking envelope from her shirt.

Eddie hurried up Polly's walk, fumbling an official-looking envelope out of his shirt as he went.

But one letter stands out: an official-looking envelope embossed with the words Scotland Yard.

The leader of crime inserted the securities in an official-looking envelope that bore no name.

The reminder came in the form of a large, official-looking envelope waiting for me when I got back to London.

The guard shoved an official-looking envelope into the cell.

Near the bottom of the pile was an official-looking envelope from the Northern Fleet.

The letters often arrive in official-looking envelopes bearing the notice "Official Business."