Explore "The Ear in the Wall" by Arthur B. Reeve on Textopian. Read with annotations and highlights.
"What do you make of that?" inquired Carton half an hour later as he met us breathlessly at the laboratory.
He unfolded a letter over which he had evidently been puzzling considerably. It was written, or rather typewritten, on plain paper. The envelope was plain and bore no marks of identification, except possibly that it had been mailed uptown.