He was the chaplain aboard the Vulcania, which carried the second group of Maltese migrants to Canada in 1948.
According to Maltamigration.com:
> The chaplain on board was Fr Lawrence Bonavia who was later on to be appointed parish priest of the Maltese church of St Paul in Toronto.
I found this link by searching for the name Bonavia along with 'Fingal' and 'St Paul' as mentioned in the 3rd and 6th verses.