A 'Free Front' from J.D. Jackson of Cork to the Prime Warden and Wardens of the Goldsmiths' Company at London, dated the 9th April 1838:
The privilege of free franking was held by four classes: Members of Parliament; peers sitting in the House of Lords; archbishops and bishops sitting in the House of Lords; office-holders, largely as stipulated by Acts of Parliament. The privilege ceased on the 9th January 1840, coinciding with the introduction of the postage stamp and penny post. The fronts were collected as an autograph collection as, to meet the requirements of free franking, the inscription of post town and date had to be in the individuals own handwriting, and his signature had to appear.
The letter was sent by Joseph Devonsher Jackson (b. 23rd June 1783 — d. 19th December 1857) to the Prime Warden and Wardens of the Goldsmiths' Company, Goldsmiths' Hall, London, via Waterford. Joseph Devonsher Jackson was an Irish Conservative MP in the United Kingdom Parliament and subsequently a Judge. He was the eldest son of Strettell Jackson of Peterborough, County Cork. He attended Trinity College, Dublin, before being called to the Irish Bar. He was the Queen's Second Serjeant for Ireland. He held the office of Chairman of County Londonderry sessions, which he resigned to seek election to Parliament. He was MP for Bandon in 1835-1841. On 10 November 1841 he was appointed Solicitor-General for Ireland. He was also made a member of the Privy Council of Ireland. This preferment had the effect of vacating his Parliamentary seat. Instead of seeking re-election in Bandon, Jackson stood for Dublin University. He represented that seat between the 11th February 1842 and the 9th September 1842. He was then appointed a Judge of the Court of Common Pleas (Ireland) 1842-1848. So he could take up the judicial post he resigned his Parliamentary seat by accepting the Chiltern Hundreds.
I've often wondered what the content of the letter may have been. If its content was hallmarking related, then why did Jackson not direct his enquiry to the Dublin Company? I am not aware of any particularly significant event in 1838 that affected the silver trade.