Share However, almost the opposite is the case. The community which had grown to just over 800 at the last census, and its 12th century lord are instead irrecoverably linked to one of Yorkshire’s darkest and most shameful events. Richard Malebisse, forester for Yorkshire, led a massacre in York in 1190 of about 150 Jews, “all but extinguishing” the city’s Jewish community to whom he had accumulated sizeable debts in the 14 years he had held the Acaster estate.