eight o'clock sharp
This was the letter Jack wrote : `` DEAR FRIEND : -- My mother 's going to have a birthday next Saturday night , and she 'll be thirty-six years old . That 's pretty old . So I 'm going to give her a surprise birthday party , and Cousin Susy 's helping me with the surprise . Please come and help too , at eight o'clock sharp . `` Yours truly , `` JACK . '' When this note was received everybody decided to go , and , which Jack did not expect , everybody decided to take a present along . `` You 'll spend all my money , wo n't you ? ''