Let's ask Gustav.

He's no end chummy with Armstrong.
He might know a thing or two.

He's the chap I told you about at Christy's minstrels," continued Master Tom, warming up at the genial reminiscence.
"Is that the French waiter down-stairs who helped bring you down from London ?" asked the doctor.
"Yes.

I'm keeping him here as valet for the present.

Armstrong mentioned, I remember, that he knew him." "Ring him up," said Tom.
Gustav appeared, all smiles and shrugs and compliments.
"_Eh bien_! my good gentleman," said he, "I am 'appy to see you well.