Synaptic. Can't find where it saves history

[Nigel Henry <cave.dnb2m97pp@aliceadsl.fr>]

Hi Folks.

Does anyone know where Synaptic saves it's history? I can view the history of 
packages installed, or uninstalled when Synaptic is open, but where exactly 
is this history saved on the machine.

Looking at the installed files for Synaptic, when Synaptic is open, nothing 
stands out. There's a whole bunch of glade stuff, 
and /usr/share/synaptic/glade/window_logview.glade, appears to be the window 
displayed when accessing the history in Synaptic, but no comments as to where 
the history displayed in this window is actually located.

Any suggestions as to where to look, commands to try, etc.

Nigel.