Yes, sport fans, it was that debonair gent Ronald MacDonald, who finished seventh out of seven finishers in Paris. Besides his work as a clown (Ray Kroc was supposedly a big track fan) and an inspiration for a well-known song, Mr. 'Old' MacDonald also won the second Boston Marathon.
I beg to differ with bf. After his posting I checked two sources (Not TandFNews which was not being published then. Not even gh is that old!) and both say there were only seven finishers and Mr. MacDonald was last.
TFN Olympic book listed 8 (Cregan 6th, which wasn't listed in other books - Wallechinsky,etc.)
Early Olympic marathons had their problems - it was this one, I think, as well as '24 C-C race, where many dropped out after inhaling fumes from a chemical plant. Plus,the French runners suspected of taking shortcuts.
You'll find all kinds of versions of what happened in the early editions of the Games. T&FN uses "The Modern Olympic Century" by Ekkehard zur Megede as its reference of choice. He says there were 13 starters, 7 finishers, with McDonald 6th, Richard Grant 7th.
In response to gh I have the 1996 publication by Britain's NUTS: '100 Years of the Olympic Marathon' edited by Bob Phillips and Roger Gynn (one of the leading authorities on the history of the marathon). While they do state difficulties documenting the early games--for example, in the 1896 race they write that there were at least 18 starters and perhaps as many as 35--for the 1900 games they have Grant 6th and MacDonald 7th out of seven finishers.