Campbell sources Yup I just saw that you had made the changes I ve been trying to find some sources for the last couple of days but couldn t I can t remember if I was the guy who put in the pen in the hand of Campbell or not I definitely read that somewhere years ago Then when I had lunch with Heinlein back in the early 80s I asked him about it and he was not happy with the concept hehe So unfortunately that falls under Original Research I guess I encountered a similar problem with other comments that I put into the Heinlein article Wish I could source this