I guess Cimeri returned to the group on the floor then. "Are those symbols just another trap? Templars did not dare to come here. May be we should not have either."

"I am sure Sabastian is quite bolstered by your words." Taman says with a smile.  He has his eyes closed, as he is currently looking through the bunny-creature's eyes.

Fulcra teeters on the edge of the ledge with Seb; it’s about a foot wide before a ‘mosaic’ begins: the rest of the floor is covered by sixteen large tiles, each of which has a glyph or symbol carved into it. They are arranged four by four. They appear to be sylized jungle creatures and none seem to repeat. 
this mosaic runs directly up to the next seven foot ledge; at his height, Fulcra can barely see into that next portion of the hallway. Very strange architectural design; he supposes that the next ledge is perhaps a three feet wide landing before a door, as he can see the top half of a door. 
Squinting, he thinks he can see carven images on the door. He can see they are arranged in rows and columns. There are four columns and he can see three rows but can’t see the bottom half of the door so there could be more. 
what do you do?

Does Taman get anything from his earlier investigation check of the first ledge?

Fulcra looks down at Taman, "It's possible the door on the far side contains a map to crossing this room without....you know.... "  (his hands make an explosion motions) "...any chance you'd let me get your bunny across the room, so it can go look?"   He concentrates, muttering a few arcane words and making a shape with his finger, and then a spectral hand appears hovering over the bunny (Mage Hand).  The index finger of the hand taps the tip of the bunny's unicorn, as if testing how sharp it is.  Fulcra grins down at Taman.  The spectral hands reaches down to grab the bunny, and then float it through the room to the far side where it can place it on the ledge so it can see the whole door.  "What do you see brave brave brave brave Sir Taman?"  

Taman chuckles as he continues looking through the bunny-creature's eyes.  He checks out this new area now as well.

Investigation:  9

(subtract one if perception is more appropriate...)

@Taman: the ledge is just a ledge as far as you can tell. Sebastian needs to make a perception check (what’s his passive perc?)

(Taman is looking through the bunny's eyes and listening through his ears, so it is taman's scores that matter, not the bunny's.  I have rolled for both checks for Taman, and you can subtract 1 from each if perception is to have been used instead of investigation.  If you really wish to use the bunny's scores, then add 1 to the checks for perception (his passive is 15)

Related Familiar info...
While your familiar is within 100 feet of you, you can communicate with it telepathically. Additionally, as an action, you can see through your familiar's eyes and hear what it hears until the start of your next turn, gaining the benefits of any special senses that the familiar has. During this time, you are deaf and blind with regard to your own senses.)

[At the moment I can’t get here while at work so using phone, otherwise would put this in spoiler]
Through Seb’s eyes, Taman has a clear view of the door; there are indeed more symbols on it. 
All in all, there are sixteen symbols on the door; previously unseen, in the very bottom row, third from the left, is a symbol of a sitting chameleon. It glows with a very faint white aura. 

Taman describes all of the symbols to the group, including their placement, loud enough so those above can hear.  "If you see something that looks like a symbol of a sitting chameleon, it probably has some special use, since it glows softly on the door." He concludes when he is finished.

"Like standing on the same one that is glowing?" The curiosity of the puzzle made Cimeri forget about the danger involved. "I can do it!" "Or we can use some rocks," after a thought added she.

"Or we could have Sabastian move to it."  Taman points out.  "He can be easily replaced, you cannot."  Taman's tone is a bit scolding as he speaks to Cimeri, sounding very protective at the same time.  "Easier to replace a familiar than you, especially with the death curse still active."

[is Cimeri going to get carried away and do it or is sebastian going to be bamfed to it?]

Cimeri will sigh but obey, letting Sabastian take the jump. Mages can get used to loose familiars but for her it was a cute fluffy animal, and the idea that he can perish was not thrilling. If there is room on the ridge, she will climb there to watch how the bunny fares.

Fulcra looks around for the glowing chameleon on the floor and spectral hands the bunny over to it, since it may be hard for Taman to position it well given where he’s standing. As he drops the bunny he says, “Good luck uni-bunny...hey guys, we should name this guy before he dies horribly.”  (He ignores Taman claims of its name being Sebastian). 

Sebastian sits up and twitches his nose curiously after being set upon the third tile from the left in the first row, with a sitting chameleon on it. Nothing untoward happens to our favorite little almiraj, which Cimeri sees as she climbs up with a boost from Bryn and balances net to Fulcra. 
What next?

Are there any changes on the wall? Another tile lights up?

Indeed. The chameleon symbol winks out and a carved symbol in the third row down, second symbol from left, of a condor in flight lights up. 

"It's working!" Happily announced Cimeri to the crowd at the down there. If not for the ridge and necessity to balance there she would clap her hands and jump up in excitement. She turned to Fulcra with eagerness shining in her eyes "Can you move him on the next tile?"

Fulcra looks at Cimeri and smiles, "This one time, I had a pet lizard named Franky. I kept him for 4 years until one day he up and died on me. Even though I really liked him, I didn't mind too much that he'd died. I think I forgot to feed him for too many days. The lesson here is....hmmm...I'm not sure entirely, just sharing I suppose."  He begins using his magic to whisk the bunny from square to square as different spots light up.