ALS, two pages on two adjoining sheets, 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, usual mailing folds (away from signature), light toning, and remnants from previous mounting on verso of first page. COA John Reznikoff/PSA/DNA and R&R COA.