How does holden know the person he runs into at ernie's? catcher in the rye

Holden takes a cab to a Greenwich Village nightclub called Ernie's, a spot he used to frequent with D. B. His cab driver is named Horwitz, and Holden takes a liking to him. But when Holden tries to ask him about the ducks in the Central Park lagoon, Horwitz unexpectedly becomes angry.

Explanation:

This is from google.

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there is no sentence to look at.

i think they are preparing for the battle of gaul. : )

i hope this you! : )