History of Castlereagh Mystery Cache

A puzzle to learn about the history of Castlereagh NSW and the man who gave his name to the area.

Cache is not at given co ordinates.

A google search will find the missing co ordinates.

Cache is located at South 33 AB.CDE East 150 FG.HIJ

A= Castlereagh post office opened in 18?7. Take 1.  

B= In 182? Viscount Castlereagh became 2nd Marquess of Londonderry.  

C= Reverend Henry Fulton  appointed Chaplain of Castlereagh in 181? Add 1.  

D= Viscount Castlereagh committed suicide on 12 August 182? Take 1  

E= Sarah Marshall was murdered at Castlereagh NSW in 18?8 Take 2.  

F= Charles Hadley was given a grant in Castlereagh area in 180? Add 1  

G= Castlereagh General Cemetery includes burials dating from 18?4  

H= Viscount Castlereagh's birth surname, number of letters. Take 1

 I= Viscount Castlereagh was said to have seen a ghost in England in a fire place. He called the ghost 'The radiant ?  Number of letters in third word.

 J= Viscount Castlereagh was Secretary of State for Foreign Affairs for how many years? Take 2

You can check your answers for this puzzle on GeoChecker.com.