My father was actually largely responsible for the rediscovery of the zeppelin knot: Mother Earth News misspelled his name when they ran the article he and my uncle Robert wrote about it. But Dad then uncovered further information that cast serious doubt on it ever being used to secure zeppelins, as can be found a little way down this page in article #6 entitled "Knot Bio Zeppelin." Small world, ain't it?
Expense Reports, Page 14