ALS, two pages, black-bordered stationery, 4.25 x 7, August 18, 1851. In full: “I am very sorry that, owing to my absence from London, I did not receive your letter until Saturday last. And I regret that my engagements will not admit of my accepting the invitation with which I am honored by the Plymouth Mechanics Institute. I esteem and appreciate that invitation, and have the warmest sympathy with all such excellent associations, but my avocations render it out of my power to attend.” Accompanied by an unsigned program for the 1928 Dickens Birthday Dinner in London. In fine condition, with remnants from previous mounting on the reverse of the first page. Auction LOA John Reznikoff/PSA/DNA and R&R COA.