Baltimore lawyer who was inspired to write The Star Spangled Banner after he witnessed the bombardment of Fort McHenry by the British in 1814. ALS signed “F. S. Key,” one page, 8 x 10, February 20, 1815. Letter to Thomas Biddle. In full, “Your cause will be called I presume in two or three weeks, but if the trial is not pressed by your opponent, it can be continued till the next Term - nor is it likely he would object to the continuance - I observe no Consul has yet entered an appearance for it. If it is thus put off till the next Term, it will afford you the means of comprising it, if you think you can do so on advantageous terms. As to your Success, I think it as certain as any thing undecided I can conceive of can be. Not only is it a very plain case in your favour, as I think, but two of the Judges of the Sup Court - Washington & Story have both so adjudged the point on which it chiefly depends. They would not, at least Story would not, of course sit in the cause, but their opinions would have weight; & it is to be presumed their decision would be confirmed by the other Judges. I should think the question so important on one to Insolvents in the different States that they would pay the debt sooner than risque a trial. Judge Washington has given me his opinion but if you have a paper containing it you may send it.” Reverse bears an integral address panel, addressed in Keyss hand, with his signature “F. S. Key,” appearing above address panel. Double cloth matted and framed with a portrait of Key, a transcript of the letter and a small plaque, to an overall size of 29.5 x 17. In fine condition, with some scattered light toning and soiling, expected folds and a few wrinkles. COA John Reznikoff/PSA/DNA and R&R COA. Oversized.