Some thoughts:
1.  I'm not at all convinced that it begins with C.  Can you please find and clip one or two examples each of both C and O for comparison.
2.  No modern forms of h are visible in the posted clips.  Unless you can see an example elsewhere, the second letter is likely to be l.
3.  There's an apparent top of a long-s near the middle of the word.  However, other examples of long-s in his writing - Busby, last, Aston, Ansley and Ensham - don't have this type of tall and curvaceous top.  Can you find another example with this top?