In the late 1980's I went on holiday for three weeks to Thailand. And, as I always do, I took several books with me. One of the books was "Jack The Ripper: The Final Solution" by Stephen Knight. It was published in 1984. In the book, almost every painting that Patricia Cornwell identified as having clues that Sickert was Jack The Ripper, are also analysed in the Knight book. Knight also implies strongly that Sickert could have been the Ripper. I find it somewhat disingenuous that at no point in this documentary did Patricia Cornwell ever mention that the Sickert connection had already been postulated nearly twenty years before she began her "research". In my humble opinion, her book (that she says cost her over $6,000,000) could not possibly have been written, nor the documentary made, had Stephen Knight not written his book first.