[The Half-Hobbit]

The silmarils were sold to a pawnshop in Mirkwood. Some years later, Galadriel visited the pawnshop while on one of her many many wanderings. Thinking they were novelty golf balls, she gave them to Celeborn. Celeborn was delighted with his present, because he could play golf in the dark wihtout fear of losing his balls. Celeborn is not very good at golf, however, and eventually he hit them into a water hazard, where they remain to this day.

Why did the orcs kidnap Merry and Pippin?