I based mine on a Jenny wheel pic and it came out similar pattern to Proctor wheel you posted. Think one side only for now. On a 10 hole hub the spoke comes from hole 1 on the rim on the inside of the hub... leaves the outside of the hub .. and goes into hole 8 of the rim (Count rim holes as for one side only ie 20 holes). Ensure the spoke at the hub is HALF way between hole 1 and 8 on the rim. Now when you do the other side the pattern is the same ie Hub hole is HALF way between hole 1 and 8 on the other side. Therefore ..because the spokes are staggered on either side of the wheel ... yes.. the holes on either hub are staggered. Does that make sense ?