Called to the bar as a lawyer in 
London in 
1857, Alston arrived in 
Victoria in 
1859 and was appointed registrar of titles for 
Vancouver Island in 
1861. A member of the Legislative Council for 
Vancouver Island in 
1861-62 and again for the united colony during 
1868-1871, Alston disapproved of more democratic forms of government. After the colonies united
                     in 
1866, he confided his pleasure in havingĀ 
got rid of the House of Apes,
 the Assembly of 
Vancouver Island. When 
British Columbia joined confederation in 
1871, he requested that the imperial government transfer him since he could see 
no hope of preferment within the Colony, inasmuch as a Responsible form of Government
                        has been established, in which all vacancies will be filled by the political friends
                        of the ministry of the day.
 He left 
British Columbia in 
August 1871 and served as queen's advocate in Sierra Leone for a year before succumbing to African
                     fever.