How to check previous Pagerank?

Hi,

How can we check pagerank of a site before the latest update?
I am working on a site and just want to know the pagerank history of that site. Anyone has any idea about any tool or any software?

 

I used to use this.

http://www.seologs.com/google-updates.html

 

toolbar pagerank history checker
http://livepr.ezer.com/pagerank_checker_report/google_live_pagerank_and_history.asp
the tool save report every time you check

 

this link is helpfull
http://www.seochat.com/seo-tools/

 

I can' understand what you are talking about.

 

I think he wants to check last quarter or last year pagerank (PR) .