[4] He was active in the British business community and was made Justice of the Peace in April 1915.
[5] In January 1916, Parr signed a petition organised by Henry Pollock to the Secretary of State for the Colonies for constitution reform in Hong Kong.
[6] He was member of the Hong Kong General Chamber of Commerce and when the Chamber moved for the exclusion of the German merchants after World War I in 1917 under the chairmanship of Percy Holyoak, he raised his support to the resolution and suggested to send their demand to the London government.
[7] On 13 May 1919 he was elected by the committee to be the representative of the Chamber of Commerce in the Legislative Council during the absence of Percy Holyoak.
[1][8] He was temporarily again appointed by the Hong Kong government as to the Legislative Council in September 1919.