^^^ It looks like it caught fire, based on the rear view. A tender for its demolition was issued in 1975 -
http://www.halifax.ca/archives/Halif...p0071-0109.pdf (page 102). I wonder if there have been any proposals for developing this lot?
On another topic, in the above document from 1975, there was a discussion about the clock in the "Old Post Office" that was donated to the city and moved from location to location (page 73).