"You are a professor of penmanship?" asked the district attorney.
"An expert in handwriting, yes, sir."
"Of many years' experience?"
"Twenty-nine."
"Have you examined the papers submitted to you by Inspector McCausland?"
"I have microscopically."
"Describe them, please, for the benefit of the jury."
"This one is a page of manuscript purporting to be the work of Robert Floyd and bearing his signature. The other contains a chemical formula."
"The bomb formula, taken from the desk of the accused," explained the district attorney. "Anything else?"
"A number, apparently jotted down on the same sheet."