Lord Byron’s poem “She walks in Beauty” is exquisite in every aspect, I have been reading it from three days and every day I get a new sense from it. Wikipedia writes

It is said to have been inspired by an event in Byron's life. On 11 June 1814, Byron attended a party in London. Among the guests was Mrs. Anne Beatrix Wilmot, wife of Byron's first cousin, Sir Robert Wilmot. He was struck by her unusual beauty, and the next morning the poem was written.

I want to know where Lord Byron said about this event and I request for other supplements, like his personal letters or some reminiscences by his acquaintances when he mentioned that poem or subject of that poem to them. Any suggestion about how can I comprehend this poem even more is heartily welcomed.

Thank you.