help with old book

[king squirrel 53]

what it is that i came across a old book it is called the waterloo cup 1922-1977 its by H.edwardes clark its is has photos of all the greyhounds that won the cup in each year from 1922-1977 all there pedigrees and who they were drew against in each round up to the final the problem is that on a few of the pages a kid has written and scribbled on some of the pages with a blue biro i was wondering if anyone knows of any good ways of getting the biro off without damaging the pages i was thinking it really is a shame as the photos of the old dogs are decent and it aint a bad read as it has a bit of a write up of the comp about the said dog as he goes through each round any help would be good atb ks