Sentence:  A <WSD>waiter</WSD> brought his aperitif, which was a small scotch and soda, and as he sipped it gratefully he sighed./    ‘Civilized,' he said to Mr. Campion. ‘Humanizing.' […] ‘Cigars and summer days and women in big hats with swansdown face-powder, that's what it reminds me of.' 
Meaning of the word marked with <WSD> tags:  A male or sometimes female attendant who serves customers at their tables in a restaurant, café or similar.