This Elder Spirits Seal has a fragment missing from it. The fragment that Melaverre gave you seems like it would fit perfectly...
You give Broken Seal of the Elder Spirits Elder Spirits Seal Fragment.
The Elder Spirits Seal seems to acknowledge your presence when you press the missing fragment into it. It teleports you to the lower levels of the Black Spear Temple...
Broken Seal of the Elder Spirits teleports you with Lower Black Spear Temple Portal Sending.
You get the sense that, in the future, simply touching the completed seal will be enough to activate the seal's magic and transport you back into the lower levels of the temple.
The description does seem to point to a book rather than a huge pillar..