There are a few irregular mutations. Rarely a B after the adverbial particle en changes to F instead of P, e.g. en fras, greatly, from bras, sometimes an M after the same particle changes to F, sometimes an initial G becomes Wh, not C or K, for the fourth state, and in the MSS. there are other exceptional changes. The mutations are very irregularly written even in the best MSS. Sometimes a word is written in its first state when it ought to be in one of the other states, and sometimes mutations are made when they ought not to be, but probably the writers used them correctly enough in speaking, without perhaps clearly recognising the changes as they made them.
The rules for the use of the initial mutations will be given, as occasion occurs, throughout the book, and they will be tabulated at the end, where they will require less explanation than they would if they were given now. But this chapter should be thoroughly learnt and understood before going any further, as these changes are a very important part of Cornish grammar, and a habit should be formed of making them correctly.
