Possible Clues:

• No problem for top minion, as arranged
• Minoan is astir? Here's one reason why
• Debauched, unlimited womanising can keep you up at night
• Trouble at night in one decaying mansion
• Trouble resting in mansion, I supposed
• Nightly frustration in order after minimum of sleep, turn in with anxiety initially?
• Mansion I converted causing sleepless state
• Doesn't cater for the dreamers and presumably won't let sleeping dogs sleep either
• A good cure for it is sleep, per W. C. Fields
• New treatment for a minion's sleeplessness