Thief of Time - Gentleman

It was a mystery to her why Death had started using the place.

Of course, he did have many of the qualities of a gentleman: he had a place in the country - a far, dark country - was unfailingly punctual, was courteous to all those he met - and sooner or later he met everyone - was well if soberly dressed, at home in any company and, proverbially, a good horseman.

The fact that he was the Grim Reaper was the only bit that didn't quite fit.

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The Thief of Time - p84