Walker suggests J.J. Richardson (elected 1853), was a different person from Jonathan Richardson (elected as a Whig in 1857 and as a Conservative in 1859). Stenton, whose entry for the MP is mostly based upon the 1862 edition of Dod's Parliamentary Companion, states that Jonathan Richardson was "First returned for Lisburn Oct. 1853, and sat until he accepted Chiltern Hundreds Feb. 1863", but also notes a distinct Jonathan Joseph Richardson, MP for Lisburn August 1853 to 1857; the dates confusingly overlap. Contemporary newspaper reports indicate that the two were distinct; see Belfast News-Letter 1 April 1857 and Northern Whig 2 April 1857.
