Ok, so when I said that the Gryphon and Mock Turtle were forgotten characters, that was only partially true. They never appeared on the big screen...but they did appear on the little one. This is a Jello commercial from the same video collection as this post. But unlike the previous one, this one is almost entirely new animation, including the Gryphon and Mock Turtle!
Alice sounds like Kathryn Beaumont, but still need to verify.