The eye witness’s writing is a primary source, and therefore more reliable than a play written about it, which might be changed to make the play more interesting
The settlers were raided during the year 1609
Prithvi Narayan Shah sent Gorkhali troops, under Kaji Biraj Thapa, to attack Nuwakot. ... After his kingdom spread from north to south, he made Kantipur the capital of expanded country, which was then known as Kingdom of Gorkha (Gorkha Samrajya).