Below the southeast corner window on the sixth floor was a large carton of books measuring approximately 18 by 12 by 14 inches which had been moved from a stack along the south wall.[C4-208] Atop this carton was a small carton marked “Rolling Readers,” measuring approximately 13 by 9 by 8 inches.[C4-209] In front of this small carton and resting partially on the windowsill was another small “Rolling Readers” carton.[C4-210] These two small cartons had been moved from a stack about three aisles away.[C4-211] The boxes in the window appeared to have been arranged as a convenient gun rest.[C4-212] (See Commission Exhibit No. 1301, p. 138.) Behind these boxes was another carton placed on the floor on which a man sitting could look southwesterly down Elm Street over the top of the “Rolling Readers” cartons.[C4-213] Next to these cartons was the handmade paper bag, previously discussed, on which appeared the print of the left index finger and right palm of Lee Harvey Oswald.[C4-214] (See Commission Exhibit No. 1302, p. 139.) The cartons were forwarded to the FBI in Washington. Sebastian F. Latona, supervisor of the Latent Fingerprint Section, testified that 20 identifiable fingerprints and 8 palmprints were developed on these cartons.[C4-215] The carton on the windowsill and the large carton below the window contained no prints which could be identified as being those of Lee Harvey Oswald.[C4-216] The other “Rolling Readers” carton, however, contained a palmprint and a fingerprint which were identified by Latona as being the left palmprint and right index fingerprint of Lee Harvey Oswald.[C4-217] (See app. X, p. 566.) The Commission has considered the possibility that the cartons might have been moved in connection with the work that was being performed on the sixth floor on November 22. Depository employees were laying a new floor at the west end and transferring books from the west to the east end of the building.[C4-218] The “Rolling Readers” cartons, however, had not been moved by the floor layers and had apparently been taken to the window from their regular position for some particular purpose.[C4-219] The “Rolling Readers” boxes contained, instead of books, light blocks used as reading aids.[C4-220] They could be easily adjusted and were still solid enough to serve as a gun rest.