Maybe you didn't realize that you're pacing back and forth a lot, staying glued to one spot, or just gesticulating so much that it's almost interpretive dance.
And the crowd that throngs the wharf as the steamer draws alongside is gay and debonair; it is a noisy, cheerful, gesticulating crowd. It is a sea of brown faces.
When I left Rome I corresponded with him, and about once in two months received from him long letters in queer English, which brought before me vividly his spluttering, enthusiastic, gesticulating conversation.