
Sinclair Centre comprises four distinctive heritage buildings. The most prominent is the old main post office, 1910 until1958.
I may have been in this building when it was the post office but the mental images are fuzzy.
In the day, when mail went by train, trains were loaded and unloaded at the rear of the post office. When the new PO was constructed a tunnel was built to transfer mail the mile or so from the old PO. About the same time mail started moving by air. The tunnel got little or no use except perhaps for storage.