I saw that artifact missing at Tumlong ruins

I was at the ruins of Tumlong few months back where the restoration work of the Palace is going on. That was my second visit to the Chogyal's Palace of till late 1700s. Even in my first visit few sculptured artifacts were lying while more than a year later the same artifacts i had seen then were still found at that ground but one of the stone with a hole in its middle was found missing. I do not know whether the stone is moved or taken away from the site.

I was looking for the photographs that i had taken of that stone in my last visit but in hundreds of CDs  went mixed up and i am happy i found it today. I believe the stone i saw was a significant one in terms of that era.