Sentence:  The Celebrity, by arts unknown, induced Mrs. Judge Short and two other ladies to call at Mohair on an <WSD>afternoon</WSD> when Mr. Cooke was trying a trotter on the track. The three returned wondering and charmed with Mrs. Cooke; they were sure she had had no hand in the furnishing of that atrocious house. 
Meaning of the word marked with <WSD> tags:  The part of the day from noon or lunchtime until sunset, evening, or suppertime or 6pm.