读英文句子回答问题here was a picture of a white horse on the door of

读英文句子回答问题
here was a picture of a white horse on the door of the bar.Then a stranger came in one day,drank something,looked around the bar,and then said to Mr.Webster,“Few people come here.Take down the picture of the white horse and put a picture of a black horse instead.”
Was there a picture of a white horse or a picture of a black horse on the door at first?