The Seawings website has a wonderful references section where you can find extract from flying manual and a pdf version of the Short Empire Manual !!
as I can't get a direct link to pdf file, this is the home page of Seawings
(select "references" on the left and then "Flying boat manuals gallery") :
http://www.seawings.co.uk/
this is the non-Pdf link the this manual :
Untitled Normal Page
Cheers,
Olivier