Complex sentence: Like the previous work, its original manuscript was discovered at the Temple of the Emerald Buddha, Phnom Penh, and it was first published by the Royal Society of Siam in 2459 BE (1916--17 CE).
Split into simpler sentences: Like the previous work, its original manuscripts were discovered at the Temple of the Emerald Buddha, Phnom Penh. The work was first published by the Royal Society of Siam in 2459 BE (1916--17 CE).