. >> and then we read the stories of two men -- samuel haskell newman, who, in april of 1876, at theial of the american revolution, came here to this church and, before a packed house, told his family's story about how his father climbed the stairs and hung the lanterns. >> but as bob said, samuel newman told that story 100 years after the event, so he didn't witness it himself. that makes him a secondary source. >> the last document that we read is one from a guy named reverend john lee watson, who actually lived in pennsylvania. he sent his own version in the form of a letter to the editor to the boston gazette, saying that it was his relative, captain john pulling, who actually hung the lanterns in the old north church. >> that's another secondary source because reverend watson wasn't an eyewitness either. having looked at the documents, next step is to hunt inside the church for clues. as bob showed me around, i asked him, "why is it important to question when and who wrote a historical document?" >> i think it's really important for us to recognize that history's not something w