There was a challenge match on 21 August at Cradley, which West Ham won 46 or 47-31.
The report in the 7 September West Ham programme says, "At full strength we have been to Cradley, where, under terrible conditions, we agreed to race a challenge fixture...our boys stormed home 46-31 (the back of the programme results list gives the score as 47-31), Sverre and Malcolm riding unbeaten throughout.
"With our league championship hopes far from doused, we certainly needed those two League points at Cradley; but we are men of our word. We agreed to race a challenge and we will honour that agreement.
"In any case, our lads are confident that they can return to Cradley and win again."
Sounds like that was the match.