walkman - 12:34 am on May 26, 2011 (gmt 0)
Your best hope is to have them in a certain directory and remove that directory, otherwise it's going to be painful. Very painful with 97,000 pages.
There's another way: pinging each 410 page and there ways of automating but not sure how Google is going to like 97,000 pings. And when if G comes, I'm not sure if it really notes in the db that the page is gone.