Because "Archibald" felt a certain reluctance about accompanying Steve to Pier Number 4 in the capacity of owner, for the sufficiently obvious reason that he might be summarily kicked off.
Such a contretemps might give cause for conjecture even in one so green as his companion, reflected Archie.
He saluted with easy grace.

"Orders, captain?
Happy to oblige.

My friend's friend is my friend." Steve saw the big steamships.

Thence, at his artless suggestion, they went to Brooklyn Bridge.

Followed rides on the Subway and Elevated, a viewing of skyscrapers and such innocent and exhilarating delights.
Noting Archibald's well-groomed and natty appearance, Steve naively asked his advice in matters sartorial, purchasing much raiment and leaving an order with a fashionable tailor.