Please check out the templates Mss, MssAu, MssD and MssUA - P isn't as a rule used for manuscripts :) thanks!
Sorry, I simply said Manuscript into the Publisher field of [[1]], using the modern skin. Perhaps the interface should offer the choice of the right templates when I do this?
You can change the field to using the template in one of them and leave the others blank.
I'll try to remember next time :-) Where are these templates documented?
Template:P eg.