So I just managed to work out the first part of the riddle "what has a bed but never sleeps? what has a mouth but no head? easy a river. It says at the end of the whole riddle that he will give him self up if I crack it.

The next bit is "I can be high and dry or I can be low and wet" I do not have a clue, but I need to get it, if has to be something to do with the river?... Um.

Hour and a half later

I got it, I screamed at the top of my voice, a seal it swims in the Water which is low and wet and sleeps on land which is high and dry.

"Ok so where is there a river that has seals swimming in it or next to it? Come here Lou, what is your schedule like today?" I asked Lou

"quite empty, why do you want my help in this misson?"said Lou

"yeah, I do we are going to go and get this guy once and for all" I said

"when you mean we you mean the royal we, as in just me?" asked Lou concerned

"yes why you chicken?" I asked

"n-no of course not, I j-just never really h-had a s-successful misson I have alway gotten really badly beaten up" said Lou

"I will be two blocks away Lou so I will have your back I promise u" I said

"Fine but you better" said Lou

"Louis you are the most handsome guy in the force, I won't let anything bad happen to you a promise is a promise, let's head on out" I told Louis

So he nodes and we leave