Sadler and Watson - Newcastle upon Tyne

[Zazie]

I am looking for Sadlers and Watsons in Newcastle upon Tyne.

This is how it goes:
Isaac Watson married Sarah Bewick Sadler  14.02 1843 in St John's Parish Church NuT. Her father is a John Sadler marked down as a 'merchant'.

I know what happened after this, but have nothing beforehand. The family story goes that the Watsons had been involved in the Border Reivers, but I have nothing on the Sadler side. 

Thanks. 

Zazie