The Earliest Mention of Holiday Hill?

In a pre-opening column on Disneyland, May 23, 1955, Hedda Hopper writes in the Los Angeles Times:

One hill is completely covered with pines, and [Disney will] have a snow machine working full time, so that kids in this area who've never had a sleigh ride can rent a sled and sail down hill.

It sounds like Cosmic Waves--but frozen!

I'll probably have a Thesaurus Thursday post tomorrow (yes, on a Friday!). I found some interesting documents online that I want to write about...