Mr. Ball. And your mark is on one of these cartridges?
Mr. McDonald. Yes, sir.
Mr. Ball. I will show you an Exhibit 519.
(The document referred to was marked Commission Exhibit No. 519 for identification.)
Mr. Ball. Is that a picture of the theatre?
Mr. McDonald. Yes, sir.
Mr. Ball. And can you mark on there the seat in which the man was seated who was the suspect?
Mr. McDonald. Yes, sir.
Mr. Ball. Put an arrow down to that seat. Did you see Oswald later that evening?
Mr. McDonald. No, sir.