I'm surprised no one has already linked to Elizabeth "Artemis" Mourat's article on my web site:
Oriental Dance: Veil Dancing In North Africa And The Middle East
This is an excerpt from her full-length manuscript titled "The Illusive Veil", and I find it to be excellent research.
In particular, please note that it mentions statements made by Samia Gamal and Tahia Carioca on the subject of veil usage in Egypt.