One. The scent of the entrance hall. A good hotel has a scent-memory of its own — wood, cut grass, some understated fragrance. Sharp perfumes and disinfectant both count against it. The nose is more honest than the eye.

Two. The way the staff look at you. Do they ‘see you,’ or ‘scan you’? The first carries a brief pause and a nod in the eyes; the second merely registers a moving object. This one cannot be taught by training — it shows in how the house treats its own people day to day.

Three. The books on the shelf. Leaf through the books in the lobby or the room: are they carefully chosen old volumes to do with this place, or decorative books bought wholesale by colour? A bookshelf is a hotel’s inner monologue.

Four. Where the water is placed. By the bed, beside the yoga mat, at the door of the gym, within reach of the bath — the position of the water reveals whether the house has truly stayed in its own rooms.

Five. The corridor late at night. Walk the corridor at eleven: have the lights been dimmed, can you still hear the hum of the plant room? By day everyone is presentable; only late at night does the craft show.

Six. The marks of pruning. Have the garden’s trees been ‘tidied,’ or ‘cared for’? The first is tense with neatness, the second as natural as if never touched. The attitude to plants is usually the attitude to guests.

Seven. The way they say ‘no.’ Make, on purpose, a small request that cannot be met, and listen to how they refuse. A good refusal carries its own alternative: I’m afraid that won’t be possible, but we could — . A hotel that can make ‘no’ comfortable to hear will surely do ‘yes’ better still.

A hotel that passes all seven is rare anywhere in the world. They share one thing in common: not a single tell has anything to do with the thickness of the marble.