This is the book I referred to earlier:
St Lawrence Hall
Publisher: Thomas Nelson ( Canada ), 1969.
185 pages.
Designed by Paul Arthur + Associates
Covers the history of the building, the architect, the National Ballet using it, floor plans, the restoration etc. Plenty of good photographs, including one showing the unbelievable stupidity of workmen who had cut through a row of structural posts when installing pipes or wires, and a chapter on the collapse and restoration.
I picked up a copy yesterday at the Sunday antique market for $8.