It's "Came the dawn in Dublin and the North East so they say
Sent a message from the Castle to Victori-o" He's saying it's people from Belfast coming down to Dublin who are doing the blowing up. That's why "they're coming *down* for you Victoria"

And in the 3rd verse it's "The Lion lost his balance, on the Unicorn he fled" The lion is riding the unicorn like a horse to get away :)