[Bell Historians] Early examples of retuned rings

[Richard Smith]

When did the practice of retuning rings of bells begin?  I can't 
immediately think of a single instance where a ring was retuned before 
the twentieth century, though I find it extremely hard to believe there 
are no such examples, particularly when rings were remodelled?  For 
example, when Kensington were topped and tailed by Warner's in 1879, 
were any of the retained Janaway bells retuned?

RAS