Lambert, described by Dalhousie in a private letter as the "combustible commodore",[1] eventually provoked a naval confrontation in extremely questionable circumstances by blockading the port of Rangoon and seizing the King Pagan's royal ship and thus started the Second Anglo-Burmese War which ended in the Company annexing the province of Pegu and renaming it Lower Burma.

[3] Richard Cobden made a scathing attack on Dalhousie for despatching a naval commodore to negotiate (gunboat diplomacy) and for raising the initial demand for compensation of £1000 to 100 times that amount, £100,000.

He also criticised Dalhousie for choosing Lambert over Colonel Archibald Bogle, the British Commissioner of Tenasserim, who was much more experienced in Burmese social and diplomatic affairs.

[1] As a consequence, Major-General Godwin occupied Prome on 9 October, encountering only slight resistance from the Burmese forces under the command of Lord Dabayin, son of Gen. Maha Bandula, who was killed in the First Anglo-Burmese War, though bitterly so, as the Major-General resented having to deal with the Royal Navy under the command of Lambert, a mere commodore, after the death of Rear Admiral Charles Austen, the brother of the writer Jane Austen.

Mindon immediately sued for peace but the two Italian priests he sent to negotiate found the British 50 miles (80 km) farther north at Myedè with a rich belt of the Ningyan teak forests already staked out within their territory and presented as a fait accompli.