Albert

Albert, Prince of Saxe-Coburg and Gotha more commonly known as Prince Albert, was the husband of Queen Victoria.

Biography
Together with George MacLeish, he created the light chamber, a device to combat the threat of "Werewolves" as dictated by legend. Albert had the Koh-i-Noor fashioned into the optimum shape to which it would best amplify the light of the Moon; this meant that it was constantly being re-cut and once finished, it was half its original size. Albert had this done so that the light chamber would best amplify the light that passed through it. (DW: Tooth and Claw)

Albert died in 1861, (REF: Doctor Who: The Encyclopedia) leaving Victoria a widow. She missed him greatly and developed a taste for the occult, with the hope of regaining contact with him. (DW: Tooth and Claw)