At this time he became interested in colonial politics and formed a friendship with Henry Parkes, a fellow liberal.

[2] Jones was unsuccessful in one attempt to enter the Legislative Council prior to the establishment of responsible self-government in 1856.

[3] He contributed significantly to the passage of reforms to the electoral act which allowed for a wide male franchise.

Jones was New South Wales' Colonial Treasurer for 119 days during the term of the second government of Charles Cowper.

However, Jones doubted his support in the assembly and recommended that the Governor give his commission to John Robertson.