These manuals are iso-patched versions.

The info about original less can be obtained from
http://home.flash.net/~marknu/less/
Current version is less-358.

The info about the original iso patch 
332+iso242 to 358+iso250 can be obtained from
http://www.io.com/~kazushi/less/

The info about the modified iso patch
358+iso242(HT-p1) can be obtained from
http://www3.big.or.jp/~sian/linux/dist/
