600 A.D. to 990 A.D.

Keystone T-1

-Fiona's Forest regrows, and a shrine is erected to Robo. 
-The tale of Glenn, Cyrus, and Magus is passed down through generations in 
Choras. 
-The Rainbow Shell is stored as a national treasure until 1000 A.D. 
*King Guardia supposedly wills that the Rainbow Shell shall be unveiled at the 
Millennial Fair. (This may have been a forgery by 1000 A.D.'s Yakra.) 
*Queen Leene composes a letter assuring Marle of the bond between her and her 
father. It is placed by the Rainbow Shell. 
*Yakra somehow regains control of the Chancellor line. 

Keystone T-2

-Fiona's Forest regrows, and a shrine is erected to Robo. 
-The tale of Glenn, Cyrus, and Magus is passed down through generations in 
Choras. 
-The Rainbow Shell is stored as a national treasure until 1000 A.D. 
*King Guardia supposedly wills that the Rainbow Shell shall be unveiled at the 
Millennial Fair. (This may have been a forgery by 1000 A.D.'s Yakra.) 
*Queen Leene composes a letter assuring Marle of the bond between her and her 
father. It is placed by the Rainbow Shell. 
*Yakra somehow regains control of the Chancellor line.
*Masa and Mune fall asleep, giving the sword capacity for corruption.

From: Chronology