Yes, you must let the guide have it.

He'll give it back to you at the gate.

I hope there won't be any trouble about it.

I believe you can be fined.

It was very naughty of you to do such a thing." Much crestfallen Irene retired into the rear of the party, and bewailed the fate of her snap-shots.
"It was hard luck the guide should pop round the corner that exact minute," she groaned.
"Mabel fetched him," squeaked Desiree.