Mr. Cadigan. Yes; I have.
Mr. Eisenberg. Mr. Cadigan, can you explain the meaning of the term standard or "known documents" as used in the field of questioned-document examination?
Mr. Cadigan. Yes. Known standards are samples of writings of an individual which are known to be in his writing and which are available for comparison with questioned or suspect writings.
Mr. Eisenberg. You have examined certain questioned writings allegedly prepared by Lee Harvey Oswald, have you, Mr. Cadigan?
Mr. Cadigan. Yes.
Mr. Eisenberg. In your examination, what documents did you use as known documents?
Mr. Cadigan. Cadigan Exhibit No. 2, Commission Exhibit No. 781, Commission Exhibit No. 778, Cadigan Exhibit No. 3, and Commission Exhibit No. 780.
Mr. Eisenberg. For the record, during the balance of the examination I will refer to these documents collectively as the known or standard writings. Mr. Cadigan, a portion of the known documents and a portion of the questioned documents are photographs rather than originals; is that correct?
Mr. Cadigan. Yes.
Mr. Eisenberg. Are you able to identify the handwriting of an individual on the basis of a photograph of that handwriting?