With the news of the mighty Princeton victory over Brown Saturday--52 to 0--comes another bit of interesting information: Greg Riley, the Tigers' starting tailback and the Ivy League's leader in total offense, received a fractured collarbone which is expected to sideline him for the rest of the season.

At any rate, he won't play against the Crimson this Saturday. Princeton coach Dick Colman released the news of Riley's injury in a special press statement Sunday, declaring regretfully that "It will take three or four weeks to heal." There are three games left in the season.

Riley, who was injured early in the first period of the Brown game, leads the league in total offense with 464 yards. After the first three Ivy games, he was top ground gainer with 300 yards and third in the league in passing with 164 yards. After six games, including Brown, Riley leads the Tigers with 459 yards on the ground and 265 in the air.

It goes without saying that his loss is no small thing. As a matter of fact, it's the main reason why bookies have picked Harvard as a one-point favorite over league-leading Princeton.

Colman's substitute for the all-important tailback position in his single wing attack could be any one of sophomores Hugh MacMillan and Pete Poreitis, and junior Dave Ibbeken. (After six games, MacMillan is second in rushing behind Riley with 188 yards; Poreitis is second in passing with 154 yards.) MacMillan will probably start.

Finding a substitute for Riley and readjusting the attack will be an extremely difficult task to accomplish in the five short days before the game in the Stadium Saturday at 1:30 p.m. (Over 30,000 fans are expected, not only because it is a Harvard-Princeton game, but also because all other Boston teams--including the Pats--will be out of town.)

The Tigers may have to resort to their defensive tricks of last year, when they effectively bottled up Harvard's running game. In that contest quarterback Terry Bartolet came off the bench and threw two touchdown passes in the second and fourth quarters in an exciting "almost-but-not-quite" effort. (The Crimson lost, 14 to 12.)

If Harvard has to take to the air again this year, watch for quarterback Bill Humenuk, who led the Crimson passing attack against Penn Saturday completing four out of six aerials for 71 yards.

Ted Halaby, who has missed the last four games because of a leg injury, returns to the squad this week. Mike Bassett and Humenuk are expected to carry the load against the Tigers, however. Halaby, who distinguished himself as Ivy Back of the Week after the second game (against Cornell), is not expected to be strong enough by Saturday. But one never knows.

The first team will see more action than it did against Penn. No player on the Bassett unit played for more than 25 minutes during the whole Penn game; fullback Bill Grana, who led the 275-yard rushing attack with 86 yards in seven attempts, played only 11 minutes.

Harvard will be at full strength. The only questionmarks in personnel are Dave Nyhan and Mike Sheridan, who were injured Saturday. Otherwise, the whole crew will be ready.

Princeton has a 4-2 record, 4-0 in Ivy competition for first place in the league. The Tigers beat Columbia, 30 to 20; Penn, 9 to 3; and Cornell, 30 to 25; in addition to the Brown whitewashing. They lost to the Rutgers in the first game, 16 to 13; and to Colgate in the fourth game, 15 to 0.

Columbia beat Cornell Saturday, 35 to 7, to give the Lions a 4-1 Ivy record and second place in the standings. Dartmouth beat Yale, 24 to 8 to remain tied with Harvard (37 to 6 over Penn) for third place.

Yale is fourth with a 2-2 record; Penn fifth with 1-3; Cornell sixth with 0-4; and Brown is last with 0-5. The 52-0 shellacking was the worst Ivy League loss the Bruins have ever suffered.

At the beginning of the season, nobody would have believed what was going to happen to Cornell.

Or for that matter, what was going to happen to Harvard.