The meaning of the line "Caught in the middle of a hundred and five" caused confusion for many years. Oldfield was finally asked about its meaning in an interview for his website in 1995: "Well, it was a hundred and five people, just signifying a large amount of people, and presumably it was a hundred and five rather than a hundred and four or whatever because "five" rhymed with the next line!".
A look at the extended version of the song supports this, with the line "The crowd gathered just to leave him" creating the image of a crowd of (105) people around the man's dead body. It didn't make much sense before Mike's explanation, though, as why would 105 people be out on the banks of a river at "4 a.m. in the morning"?
Also, the video of the song shows the scene of the incident as totally desolate and lit only by the moonlight. The only crowd of people in the video (which by no means reaches 105) are in the weird mansion house the widow runs in to, presumably in search for help. But the version of the track used for the video is the short radio edit, minus the verse describing the "crowd." So then the line "Caught in the middle of a hundred and five" was a real mystery.