Great stuff everyone!
Thanks for the links Closrapexa and Macavity; and Diwha I also did some research and found the same info about the "working in co-operation".
Interesting Centaur about them also being "keys" as this thought had crossed my mind that they might be keys to a gateway or somewhere.
Then I found on the Royal Road site the following about the two Anubis statues (being Guardians):
The Guardians of the narrow way are Anubis in double form. He guards the Threshold of Life, which is also the Threshold of Death.
Maybe that is what the keys are for - the Threshold of Life / Death.
Also that might explain the "working in co-operation" - they are together guarding the threshold - and it could be that it takes both keys to unlock it?
Speaking of the Threshold of Life/Death, I can't see it in the Thoth Death Card, but in the RW Death card you can see the two "Towers" of the Moon in the distance - and this does put another twist on the pathway in the Moon card being the threshold of Life/Death - sort of explains where the road may lead. Going off on a tangent here - but it made a connection for me!
CreativeFire