The most extremely poorly recorded area of the Palace was the basement level.
Coming across this picture again, left me puzzling about it's location.
Basement?
Roofers at Work on Exhibition House
Builders carry tiles onto the roof of a house which is under construction in Crystal Palace, for the South London Exhibition.
IMAGE:
© Hulton-Deutsch Collection/CORBIS
DATE PHOTOGRAPHED
February 18, 1935

http://pro.corbis.com/Enlargement/Enlar ... ler=search
Now this definitely the same floor as the image below, the statues are the same!

http://www.crystalpalacemuseum.org.uk/image_024.html
"Birds arriving for the ever popular Caged Bird Show - notice the railway porters assisting c.1929."
Now I always though that image was taken in the basement, there seems to be a ceiling reflecting the light back down, and that's a lot of wall.

http://www.gettyimages.com/detail/26427 ... on-Archive
November 1932
Basement surely?

http://www.gettyimages.com/detail/30882 ... on-Archive
Enid Sass 17th November 1931
And again?