1898: Manager, Pengerang Planting Company, Limited. https://books.google.com.my/books?id=yUizWXDK6cYC&pg=RA3-PA414&lpg=RA3-PA414
1904: Manager of Glen Marie Estate https://books.google.com.my/books?id=WYxEAQAAMAAJ&pg=RA1-PA682&lpg=RA1-PA682
1/10/1904: Manager of Sungei Rengam Estate. Acknowledged by Herbert C. Robinson for materials in his
report. http://www.sabrizain.org/malaya/library/fmsjournal01.txt Sungei Rengam is now Shah Alam: https://forum.lowyat.net/topic/5184620/+240#
15/5/1907: On 15 March 1907, The Ayer Hitam Planting Syndicate Limited was registered and
incorporated under the Companies Enactment 1897. The authorised share capital was $500,000 divided
into 500,000 shares of $1.00 each. The first directors were Messrs. R.W. Harrison, John Gibson, G.H.
Day and P.W. Parkinson. The Company cultivated rubber at the Bukit Hitam Estate in Selangor. https://ayer.com.my/our-story Through our subsidiary Bukit Hitam Development Sdn Bhd, our property portfolio extends across homes,
commercial units and industrial buildings. We continue to launch new projects in Bukit Puchong. http://mpi.my/wp/wp-content/HKM%202013/artikel/D-11.pdf
1908: Still Manager of SUNGEI RENGAM ESTATE (also Lieutenant of the corps?) http://seasiavisions.library.cornell.edu/catalog/seapage:233_469 http://seasiavisions.library.cornell.edu/catalog/seapage:233_604 https://books.google.com.my/books?id=GoxEAQAAMAAJ&pg=PA1282&lpg=PA1282
10/8/1909 - 30/4/1910: Representative, Batu Tiga District Planters' Association https://archive.org/stream/agriculturalbul00i/agriculturalbul00i_djvu.txt
26/3/1911: Visitor, Planters' Association of Malaya meeting. https://digitalgems.nus.edu.sg/shared/colls/blsea/files/AgrBul_v10_n05.pdf
06/01/1913: APPLICATION FROM LIEUTENANT P.W. PARKINSON TO BE PERMITTED TO RESIGN HIS COMMISSION IN
THE MALAY STATE VOLUNTEER RIFLES- FORWARDS RECOMMENDING- http://ofa.arkib.gov.my/ofa/collection/asset/664483
29/9/1922: Visit to Malaya. https://eresources.nlb.gov.sg/newspapers/Digitised/Article/maltribune19220929-1.2.28
13/6/1928: Lieut.-Col. P.W.Parkinson, director-president of Bukit Panjong, Ltd. https://eresources.nlb.gov.sg/newspapers/Digitised/Article/maltribune19280613-1.2.14
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