pieces of broken metal in the sump

took my sump off today to sort the leak out and found all these little broken red and bronzey bits at the bottom of the sump, i hope the pik works as im rubbish with this sort of stuff but if ayone knows where the bits might have come from so i dot break anything else trying to find it, then help would be apreciated
cheers

The bronze parts look very like cam follower roller holders, in the side of the head.

oooh that sounds dangerous, im new to major mechanics so this will be the first engine i take apart