"You may have met Him—did you not?
..."See in text(A Narrow Fellow in the Grass)
The speaker directly addresses the reader here, and the dialogue seems formal, but nonchalant. The use of the verb “met” is also casual, making an encounter with a snake seem unalarming, normal, and even cordial. Note too, that the snake is personified again with intentional capitalization of “Him,” giving the snake a less menacing, more human presence.
"narrow Fellow..."See in text(A Narrow Fellow in the Grass)
Notice that the word “Fellow” is capitalized. Dickinson often capitalized various words in her poems for emphasis. It is unclear why Dickinson chose to capitalize “Fellow,” but it could be speculated that since the snake is personified as a “narrow Fellow,” the capitalization might be acting as it would for a proper noun, further personifying the snake.