Hi Craig,
Was there a groove cut all along the top surface of the timbers located immediate;y beneath the golf ball holes ?
Wattle & daub staves (verticals) are pencil pointed on the top end and chisel shaped on the bottom end with the chisel end trimmed to length to ensure that the stave fitted tightly into the groove. The wattles were then woven between the staves.
Regards
Ken Hume