I have an idle moment so I'm going to float a query that occurred to me some time ago. Having watched the Snows take on the Battle of the Boyne on the BBC I was puzzled why Wee Dutch Billys Plan for crossing the river appeared to be simply for the troops to stick their powder on their heads and wade across. From the descriptions I have seen the delay in getting troops (particularly cavalry) across the Boyne at the battle site were almost Williams downfall. Bluntly why no Sapper input? Was there just no time to organise anything else?