Byrd,
Correction! Lawrence Solomon is the author of that article in the National Post. William Connolley is the "website administrator" at Wikipedia who rewrote articles, deleted others and banned certain individuals from posting to Wikipedia.

I did go check Wikipedia's Medieval Warm Period [en.wikipedia.org] The "Reconstructed Temperature" graph is a version of Mann's famous 'Hockey Stick' with additions by Phil Jones and others.

"The Stone Age did not end for lack of stone, and the Oil Age will end long before the world runs out of oil"

-- Sheikh Zaki Yamani