Who called Blore a liar?

From the text:

"I will add something," said Lombard. "Not only are you here under a false name,
Mr. Blore, but in addition I've noticed this evening that you're a first-class liar.
You claim to have come from Natal, South Africa. I know South Africa and Natal
and I'm prepared to swear that you've never set foot in South Africa in your life."