I am trying to faithfully recreate the typographic style of a Victorian era book. One thing I've noticed is the extensive use of dashes: em-dashes are everywhere, for example.
Beyond the em dash however, I notice a set of even longer dashes. For example the dash used to indicate a pause in conversation due to a sudden interruption is about 1.5 times the length of an em dash. A similarly long dash is used to indicate the missing part of a name, e.g. "He traveled by horse to W-----".
How can I go about defining and working with dashes longer than an em dash. I can't seem to find any information on the web? I'm using XeLaTeX for my work.