During the
First World War, in 1915 commercial and ethnic rivalries erupted into
riots throughout British Ceylon by Buddhists and Christians against Muslims. Fearing a possible uprising, the inexperienced
Governor of Ceylon Sir Robert Chalmers declared
martial law on 2 June 1915 and on the advice of Inspector General
Herbert Dowbiggin began to suppress the riots by issuing orders to the colonial police and military to
summarily execute anyone they deemed to be a rioter. Many prominent Sri Lankans such as
D. S. Senanayake,
D. R. Wijewardena,
Arthur V. Dias, Dr.
Cassius Pereira, Dr.
W. A. de Silva, F.R.
Dias Bandaranaike,
H. W. Amarasuriya and
A.H. Molamure were imprisoned and
Captain D.E.Henry Pedris, a militia commander, was executed on the charge of
mutiny. . A memorandum was drafted at a secret meeting held at Perera's residence, initiated by Sir
James Peiris with the participation of Sir
Ponnambalam Ramanathan. Before presenting it to the
His Majesty's Government, the support of the
British members of parliament and the press in England had to be obtained. Travelling to England by sea was dangerous due to the presence of German submarines in the region. Abandoning a promising career at the Bar, Perera undertook the task of going over to England by obtaining permission saying he was going to do some research in the
British Museum. To his advantage, the British treated him as a scholarly Christian Barrister rather than an independence activist. He was accompanied by
George E. de Silva. In England, he was joined by Sir Ponnambalam Ramanathan and later by Sir
D.B Jayatilaka and they presented the memorandum to the
Secretary of State for the Colonies, pleading for the repeal of
martial law and describing the atrocities committed by the Police led by Dowbiggin. The mission was a success. The British government ordered the release of the leaders who were in detention. Several high officials were transferred. A new Governor, Sir
John Anderson was sent to replace Sir Robert Chalmers with instructions to inquire and report to His Majesty's Government. Perera's effort was greatly appreciated and he was thereafter referred to as the
Lion of Kotte. It was also Perera who with the help of
D. R. Wijewardena, the press baron (grandfather of current president of Sri Lanka
Ranil Wickramasinghe) traced the location of the banner of last King Sri Vikrama Rajasinghe, the last king of the
Kingdom of Kandy to the
Royal Hospital Chelsea, where it had been kept since the surrender of the Kingdom to the British in 1815. The recovered banner became a focal point in the independence movement and it became the flag of the
Dominion of Ceylon upon its independence in 1948. ==Political career==