Drystan takes Halie around to the landward bridge post and shows her how to activate and dispel the bridge to Eilean Chon (and says that it's the same activation on the other end as well).
It takes a couple of minutes to cross the bridge (unless Halie's in a hurry) and reach the dock on the island.
The laboratory building is made of wood, and appears to take up most of the usable area of the island. There's about three or four feet of flat ground around the building before it slopes down to the water's edge, and there are several Burnet Rose bushes planted around the building.
There doesn't seem to be any particular secret to entering the laboratory – just open the door and waltz right in. When she and Drystan enters the lab, she notices that there is a warm ambient light (bright as a sunny day) and the lab is toasty warm. The room seemed to become light as soon as they crossed the threshold.
From the opposite corner of the lab, a large murky watery figure looms. "Who dares trespass," he says in a loud, gurgly voice before Drystan cuts him off.
"Cedric, be nice. We have company. Cedric, this is the maga Halie Bjornaeris, she is living here now. Halie, this is Cedric. He's the guardian of the laboratory."
Drystan goes to a padlocked chest in a corner and touches the lock while casting a spontaneous Rego Terram spell that pops the lock. He opens the chest and places the vis inside, then closes and locks the chest again.
He shows her around the laboratory, pointing out all the features and the bells and whistles that it has.