seven o'clock
`` And now where shall we go ? '' asked Frank , as they whizzed along . `` That will depend upon the wind , '' came from Tom . `` Remember , we must get back before seven o'clock . '' `` Yah , der vint is eferydings , '' put in Hans . `` Supposin ' ve git far avay und der vint sthops plowing , vot den ? '' `` Then we 'll set you on the rear seat to blow the sail yourself , '' replied Frank .