Package install history - logs etc ?

[Richard Owlett <rowlett@cloud85.net>]

I'm trying to review the history of installing packages on this system.
All my installs are done Synaptic or apt-get.
I want to review the time order of installs to jog my memory on an 
unrelated issue.

I have found Synaptic's File->History menu entry and the
/var/log/apt/history.log.NNN.gz files.
Is there anywhere else I should look?
TIA