McLeod’s book is located here the date is 1815.
Morse references Mcleod, MCLeod references Vattel..not sure the Vattel edition.
http://books.google.com.ph/books?id=kLUTAAAAYAAJ&printsec=frontcover&dq=The+causes+of+the+present+war+Alexander+McLeod&as_brr=1&hl=en&cd=1#v=onepage&q&f=false
