Mr. Nicol.

No. The only other work I did on it was with respect to an examination of the nose of Q-1 to ascertain whether there was any evidence of ricochet or perhaps contact with fabric and so on.
However, although there were some fine striations on there, there was nothing of such a nature that it would, suggest a pattern, like a weave pattern or anything of that nature. So that except for the nick, which I understand has been explained as a site where spectrographic tests were conducted no further tests were run on either of those projectiles.

Mr. Eisenberg.

Yes.
For the record, the nick which Mr. Nicol refers to was in the nose of what was given to you as Q-l--and which I have been informed was a bit of metal that was taken out by the FBI to make a spectrographic test on the chemical composition of the bullet, and therefore was not produced in the process of firing the bullet.
Now, Mr. Nicol, I hand you Commission Exhibits 545, 543, and 544, which for the record consist of three shells, three rifle cartridge cases, which were found on the sixth floor of the TSBD building at the easternmost corner of the south face. I ask you whether you are familiar with those shells?

Mr. Dulles.

They bear your mark?

Mr. Nicol.

Yes, sir.; there is a little JDN inscribed very lightly under the Q position.

Mr. Eisenberg.

You are familiar with these shells?

Mr. Nicol.

Yes, sir. And these were given to me by you on the same day I received the projectiles.

Mr. Eisenberg.

I hand you Commission Exhibit 557, which also consists of--which consists of two expended shells, and I ask you whether you are familiar with them.

Mr. Nicol.

Yes, sir. These are the specimens, the two shells which I used as standards or tests to compare against the other three fired cartridge cases.

Mr. Eisenberg.

And you obtained those from what source?

Mr. Nicol.

I obtained these from Mr. Eisenberg on the 24th of March here in this office.

Mr. Eisenberg.

Again for the record, I obtained these shells from the FBI and turned them over directly to Mr. Nicol, and they have been identified earlier as having been fired by the FBI from Exhibit 139, the rifle found on the sixth floor of the TSBD building.
Now, Mr. Nicol, did you examine the shells in Exhibits 543, 544, and 545 to determine whether they had been fired from the same rifle as fired the shells in Exhibit 557?

Mr. Nicol.

Yes; I did.

Mr. Eisenberg.

And what was your conclusion?

Mr. Nicol.

Based upon the similarity of the firing-pin impressions and the breech-block markings, as well as ejector and extractor marks, it is my opinion that all three of the exhibits, 545, 543, and 544, were fired in the same weapon as fired Exhibit 557.

Mr. Eisenberg.

Mr. Nicol, did you take photographs of the various shells under the microscope?

Mr. Nicol.

I took photographs of the specimen which I referred to, or was referred to, as Q-48, which would be this.

Mr. Eisenberg.

Yes. That is Commission Exhibit 545.

Mr. Nicol.

These were also taken under the comparison microscope in the same fashion as the other specimens.

Mr. Eisenberg.

And these were taken by you?

Mr. Nicol.

These were taken by me.

Mr. Eisenberg.

Mr. Chairman, I ask permission to introduce this as Exhibit 613.

Mr. Dulles.

It may be received.
(The photograph referred to was marked Commission Exhibit No. 613 and received in evidence.)

Mr. Eisenberg.

Now, you have extra copies of this photograph?

Mr. Nicol.

Yes; I do.