Board 9 - the spade lead had the most to commend it? D lead was no good, H definitely not, and C would round to hand that bid the suit so not good either. S lead would be ‘through’ the strong hand, that had bid S. Their partner didn’t take S on, so probably only had 1 or 2. Your partner surely had some S so leading 4th highest S through W would have been the best option?