Joseph Bertony: The spy who helped mastermind the Sydney Opera House

Joseph Bertony, whose 30,000 hand-written sums made the building's iconic sails possible, has died. from BBC News - World https://bbc....

Joseph Bertony, whose 30,000 hand-written sums made the building's iconic sails possible, has died.

from BBC News - World https://bbc.in/2X0e3HI