...No, of course I didn't. [ she's stunned to discover that his siblings had been unaware of his imprisonment, though — didn't the endless know everything?

perhaps not. if there'd been no way to let them know, and he'd been trapped with magic as she's certain he was, they couldn't save him. it dawns on her that if the circumstances hadn't happened as they did — whatever they were — to let him free, he might have been trapped there for more than just a century. eons, millenia, if that house had remained standing. ]

You were captured by Burgess, because he used the tools of magic. Summoning spell; binding spell to keep you weak, and trapped within the circle. Demons are just as susceptible.

Regardless if it's Lucifer Morningstar, or another amateur like Burgess who happens to cut some sort of a deal with your wayward sibling who wants you gone — magic is what can trap you, suspend you. You're bound by its laws and rules, the same way we humans are by gravitational forces on earth. It's inescapable.

[ ...and by his own account, without divulging too much of it, he's equated such imprisonment with a fate worse than death, for one of his kind.

she leans further forward over the table, speaking quietly, less bullheaded obstinacy and more an appeal to his rational nature. ]

You need me, Morpheus. Don't shut me out.