Mr. Dobbs. Yes.

Mr. Rankin. Who is that Bob Chester?

Mr. Dobbs. It is an associate of mine, works in collaboration with me, a day volunteer here in the party office.

Mr. Rankin. Do you know anything about the blowups, reversal and reproduction work that he refers to there?

Mr. Dobbs. I can only assume that he would have written about——

Mr. Watts. Excuse me. You should answer what you know, Farrell; and if you want to express an opinion, it is all right, but make it very clear whether or not you have any knowledge.

Mr. Dobbs. Would you ask me the question again; perhaps I did not understand.

Mr. Rankin. I am interested in your knowledge about that material that is referred to in the letter, the blowups and reproductions and the other things that are referred to in the first paragraph.

Mr. Dobbs. So far as I can perceive, it refers to a technical process. I wouldn't know anything beyond that.

Mr. Rankin. And you don't know whether there was anything of that kind; at least you did not find it when you made the search?