Jack the Ripper, who savagely killed five London women a century ago, wrote in blood-red ink, "I love my work," and vowed to mutilate prostitutes until he was caught, according to a letter released this week by Scotland Yard.

"I am down on whores and I shan't quit ripping them until I do get buckled," a writer claiming to be the Ripper told a London news agency. "My knife's so nice and sharp I want to get to work right away if I get a chance."Scotland Yard called the document it released Thursday "the original handwritten letter in red ink from the Ripper to Central News." It was dated Sept. 25, 1888, shortly after a second woman was butchered in East London.

Police also released 14 other documents and six sepia-tinted photographs of five corpses mutilated by the killer, whose identity remains a mystery despite 100 years of detective work.

Even with the new information, England's biggest whodunit remains unsolved, said John Dellow, deputy commissioner at Scotland Yard and a trustee of the Metropolitan Police Museums Trust.

"I don't think it takes us any further forward at all."