seven o'clock
`` Well , you saw those tar-roofers at work on the new top of the dock at Cedarville ? '' `` Yes . '' `` I bought three empty tar-barrels from the foreman . He is going to leave them in the woods yonder for me at seven o'clock . They 'll make the finest bonfires you ever saw . '' `` That 's the cheese ! '' cried Dale , slangily .