From MangaHelpers:
In the Kuro Hakubutsukan (Black Museum) series:

Vol 1 - Springald:
The Black Museum holds criminal memorabilia from the many cases that have been investigated by Scotland Yard. In this fictional re-imagining of the popular legend, a visitor comes to see a piece of particular interest, the leg of Spring-Heeled Jack. When the curator guides him to the piece, he begins to tell his story of the case of Spring-Heeled Jack, which began in the late 1830s.
The earlier adventures of Spring-Heeled Jack involved an eccentric nobleman named Walter, who used his specially made suit to harass women. After an encounter with a very strong-willed woman named Margaret, Walter hung up his Spring-Heeled suit for good. Three years later, Spring-Heeled Jack returns, this time with a penchant for murder. Detective James Rockenfield first suspects Walter, but soon it begins to seem that someone else has taken up the mantle.

Vol 2-3 - Ghost and Lady:
Deep in London’s Scotland Yard sits an evidence room dedicated to the greatest mysteries of British history. In this “Black Museum” sits a misshapen hunk of lead—two bullets fused together—the key to the untold story of a wartime encounter between Florence Nightingale, the mother of modern nursing, and a supernatural Man in Grey. The record books show Florence fought for compassion as empires’ petty rivalries threatened to destroy the hopes and lives of common people. But a guest in the Black Museum knows the truth is not so simple, and the famed Lady with the Lamp had a ghastly secret.

Official English