[11] The document dated Bikram Samvat 1833 Bhadra Vadi 3 Roj 6 (i.e. Friday 2 August 1776), shows that he had carried the title of Dewan along with Swaroop Singh Karki.

[14][15] Queen regent Rajendra Laxmi Devi also called up exiled courtier and his rival Swaroop Singh Karki to attack on Lamjung Kingdom.

[14] Vamsharaj had fought battles against Makwanpur, Timal and Sindhuli in 1762, Kirtipur in 1764, Chihan Danda in 1766, Tanahun in 1770, Pauwa Gadh in 1776, and Lamjung in 1783 A.D.[16] Bamsha Raj was beheaded on the conspiracy of Queen Rajendra Laxmi with the help of supporters including senior minister Kaji Swarup Singh Karki.

[17][18] In the special tribunal meeting at Bhandarkhal garden, east of Kathmandu Durbar, Swaroop Singh held Bamsa Raj liable for letting the King of Parbat, Kirtibam Malla, to run away in the battle a year before.

[20] Daniel Wright points out that King Rana Bahadur Shah was responsible for giving Bamsha Raj the death penalty.

[21] The document dated Bikram Samvat 1833 Bhadra Vadi 3 Roj 6 (i.e. Friday 2 August 1776), shows that he had carried the title of Dewan (equivalent to Prime Minister) along with Swaroop Singh Karki.