Explore Sirrus's room. Open all the drawers. You will find the red page in a drawer. Also, you will find a torn page that talks about "Vault Access" and "marker switches". This is important, make note of this.
What is that stuff on the table...rotting cheese. Yuk! Sometimes Sirrus is as sloppy as Achenar!
Go back to Channelwood Age -- Third level.