From 1858 Wall sat on the Legislative Council of Ceylon as an unofficial member, supporting the case against the Paddy Tax.

[3] On 15 November 1864, Wall along with James De Alwis, Charles Lorenz, W. Thompson, John Capper and John Eaton resigned from the Council on a point of principle regarding the fiscal policy of the Government and its strict disregard to respect the procedures of the Legislative Council.

[4] Wall returned to England in 1859 and spent the next four years in Manchester, where he served as a partner with his former employer, Sir Joseph Whitworth & Co., enjoying success in small arms manufacturing.

[7][8] In 1892 Wall received the Gold Medal from the Cobden Club for his efforts in abolishing the Ceylon Grain tax.

[10] A Hindu-Saracenic fountain at the Lipton Circus junction in Cinnamon Gardens, Colombo was erected in memory of Wall.