Values on a known address

Values on a known address

[ldries46]

For Debugging purposes I need to see if the value of a certain 
Gtk_Text_Iter value is valid
I can see the address on which the value is located but I don't know how 
to print the value on that address?

The value is declared as
     Start_Iter : Gtk_Text_Iter;

I have some debugging print statements made which can print string 
types, integer types, floating types.

With Print( Start_Iter'Address) I can see Address How can I see the 
value on that address.