Would anybody help me understand the last sentence?

Occasionally disaster struck, as when a young English girl on a balcony threw a handful of comfits at a papal policeman. The carabiniere, furious, marched up to the balcony – from which the girl had already fled – though fortunately he ‘was a good natured fellow and consented very willingly to drink the Pope’s... show more Occasionally disaster struck, as when a young English girl on a balcony threw a handful of comfits at a papal policeman. The carabiniere, furious, marched up to the balcony – from which the girl had already fled – though fortunately he ‘was a good natured fellow and consented very willingly to drink the Pope’s health with a glass
of rosolio’.

What does the last sentence " consented very willingly to drink the Pope’s health with a glass
of rosolio" mean?

Thanks in advance.
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