User blog comment:Kaido King of the Beasts/Talk about the Bloodbath-I mean Chapter 767!/@comment-24850639-20141114204923/@comment-137.150.160.195-20141114221034

Okay, so basically Rocinate used 'Calm' so Law wouldn't make sound inside the box, with the goal being that while Doffy left with his crew after telling them Law escaped the Bird Cage he could escpae in perfect silence from the box—as the rest of the pirates walked towards their ship with the treasure.

The report about the kid is Dorry, the kid shown running from the bird cage instead of saving the pirate that called out to hi—followed by Diez Barrels noting Dorry's cowardice despite how strong he is. The key is that Dorry is most likely a young X Drake— born/became infamous in North Blue like Sanji (birth only) and Law, and has the same x-shaped chin scar (not to meniton Diez is 10 in Spanish, just as X is in roman numerals).

PS Law may not even know X Drake is the same guy...

Does that help any?