Russell, Francis (junio de 1962). «Sacco Guilty, Vanzetti Innocent?». American Heritage13 (4): 111. «About the gun found on Vanzetti there is too much uncertainty to come to any conclusion. Being of .38 caliber, it was obviously not used at South Braintree, where all the bullets fired were .32's».
Russell, Francis (junio de 1962). «Sacco Guilty, Vanzetti Innocent?». American Heritage13 (4): 107. «At the conclusion of the investigation Thayer passed no judgment as to who had switched the barrels but merely noted that the rusty barrel in the new pistol had come from Sacco's Colt.»
