Sad and Rabid Puppies are spending unlimited effort to find old Hugo recommendation lists in order to prove with geometric logic that people were trying to manipulate the awards before they came along.
Allow me to spare you further digging!
I now provide definitive evidence that the earliest appeal to organize bloc voting for the Hugos occurred in the very year the awards were invented.
What may surprise you is that the appeal came from the Philcon II committee itself. See the second paragraph below from the August 1953 Progress Report.