Only 7 murders? The population of London was apparently about 400,000 back then so that's less than half the murder rate of present-day New York City (which is considered a relatively safe city). I don't think that can be right...
1632 London: 7 / 400,000 = 17.5 murders per million people
2023 New York: 312 / 8,258,000 = 37.8 murders per million people