Unk tells a story to his two nephews about the time when he and Joe visited the stone-covered
grave and haunted cabin of Mad Dick where they (and their dog, Soxie) were able to view the
prehistoric past through a queer looking instrument that accidentally allowed T. Rex onto
Slumber Mountain. Sadly, at the end, Unk suggests that it was all a dream, but what does he
know?!
The IMDb lists Herbert
M. Dawley as a co-writer, but Wikipedia
lists him as only the producer. The initial three-reel film premiered at the Strand Theater,
but an unhappy Dawley cut it from over 40 minutes to about 12. Around six extra minutes were
later restored by the Dinosaur Museum of Blanding, Utah, in 2016, but the full version no
longer exists.
— Michael Main
Far, far away, at the foot of a cliff, a Thunder Lizard—which must have been at least
one hundred feet long—appeared out of the mists of forty million years.