Paul J. Andrew
As suggested in Uncle Jim's thread I picked up a copy of Strunk and White. On the very first page something struck me as quite odd. Ever since gradeschool I've been told possessive of a person whose name ends with an s is simply an apostrophe. Ie: Markus'. But the little grey book says to use apostrophe followed by an s, whatever the final consonant (Markus's). So, since it sounds right to me I simply follow what I was taught in school. Is there a definitive correct way to address this?