Just use the URL. The thread ID number appears to be sequential more or less. This post right now is 13074914 (letsrun.com/forum/flat_read.php?thread=13074914). The oldest I could get to load with a quick trial and error is thread number 100, dated July 2, 2002. thread=99 doesn't load nor does thread=1. I am too lazy to check all the numbers in between to see if anything loads there.