Mr. FRAZIER. To position the rifle, we selected boxes of the same size and contour as boxes shown in a photograph or rather in two photographs, reportedly taken by the police department at Dallas shortly after the assassination. We placed these boxes in their relative position in front of the window spacing them from left to right, according to the photographs which were furnished to us, and also placing them up against the window, with one of them resting on the window ledge as it was shown in the photographs. Mr. SPECTER. In addition to the placement of the boxes, were there any other guides which you had for reconstructing the position of the rifle to the way which you believed it to have been held on November 22, 1963? Mr. FRAZIER. Yes, sir; there was one physical obstruction in the building which could not be moved consisting of two vertical pipes located just at the left side of the sixth floor window. These prevented me or anyone who was shooting from that window from moving any further to the left. The position of the rifle, of course, had to be such that it could be sighted out through the window, using the telescopic sight high enough above the window ledge so that the muzzle of the weapon would clear the window ledge, and low enough in position so that the bottom of the window, which was only partially raised, would not interfere with a view through the telescopic sight, which is approximately 2 inches higher than the actual bore of the weapon. Mr. SPECTER. Did you position the rifle further, based on information provided to you concerning the testimony of certain eyewitnesses at the assassination scene concerning what they observed? Mr. FRAZIER. Yes, sir; we attempted to put the muzzle of the weapon sufficiently far out the window so it would have been visible from below. Mr. SPECTER. Mr. Frazier, referring to Commission Exhibit No. 886, did you view through the sight that depicted in "photograph through rifle scope" on the positioning of the Presidential limousine or the car to simulate the limousine at position A? Mr. FRAZIER. Yes, sir; this would be the first position that an individual in that sixth floor window could sight at the car due to the interference of the window ledge of the building and the fact that the angle downward is limited by the partially lowered window. Mr. SPECTER. I now hand you Commission Exhibit No. 888 and ask you if you had the view depicted on the "photograph through the rifle scope" shown on that exhibit? Mr. FRAZIER. Yes, sir; this Exhibit No. 888 is frame 161, and is the position at which I had the car stopped just before the spot, indicating the entrance wound on the back of the President's stand-in, passed into the foliage of the tree. Mr. SPECTER. I now hand you Exhibits Nos. 889, 890, and 891, and ask you if you had the view on each of those depicted in the "photograph through rifle scope"?