When was Ferumbras seen and slained for the first time?

Question

As per Tibia Fandom; 

"Ferumbras was first sighted on Eternia on August 21th 2006, but a bug prevented players from reaching him. He appeared there again after two weeks when the bug had been fixed.

He was first killed on Antica on October 13th 2006."

However what is the source of this information?

Answer 1

From Tibia Archive:

31st January 2001 - The Fight for Freedom  :

 ongratulations Tibians,

Ferumbras and his minions are finally dead. Well done.

We will publish the best screenshots of the fight on our website.
Please send the pictures to Durin. Send only jpeg picture format, maximum size 480x400 pixel, including a comment of the screenshot.

Rest in peace Ferumbras!
Your CIP Team

01 March 2007- Ferumbras was beaten. Yesterday brave adventurers joined together and defeated the most evil and powerful sorcerer in the lands of Tibia. Congratulations to the team of Harmonia!

May 15 2007-Once again, Ferumbras  the mightiest sorcerer in Tibia, was defeated by strong and brave adventurers. Congratulations to the team of Hiberna!

Further Reading

07 April 2014 - The Birth of Ferumbras