The bell tower doesn’t look to have been part of the original design, though. The visual mass does not reside with the massing of the rest of the structure at all. The columns are almost delicate. The only element(s) that echo the rest of the structure would be the Gothic arch, and in the bell tower, they end up with an almost mideastern look and feel. It’s jarring.
I do think the bell tower was part of the original design; I just don’t see any particular Masonic symbolism. Tudor revival would probably be the best description of the building. Many elements like the ogee curves of the tower have precedent in English architecture. See Hampton Court Palace, http://www.hrp.org.uk/hamptoncourtpalace/ for a good example.