Mr. C's birthday present

Today, 15th of August marks someone's special day.
It's not you
and it's definitely not me.
It's Mr. C's, the funny boyfriend.

Eleven envelops were left behind,
each a note with a little present.
The final one gives hints and clues,
Hints and clues that will lead to a present.

and if you can't find it
despite the clues,
Just look for it in the below box
and try to remember where you placed it last!

Happy hunting Mr. C!!