Georgetown Coach John Thompson signed 6-foot-9, 240-pound forward/center Ralph Dalton to a national letter of intent Tuesday night, reducing the school's number of available basketball scholarships to one.

Dalton, who averaged 17 points and 19 rebounds for Fishburne Military Academy in Waynesboro, Va., as a senior, played in at least two summer all-star games in August under the name Ralph Brown.

Dalton, from Suitland, Md., said at the time that tkaing an alias was his idea, something he hoped would prove to be "a good way to get the recruiters off me." Dalton used his own name last summer when playing in the Urban Coalition League for the 1789 team, made up of Georgetown alumni, varsity players and recruits.

The addition of Dalton stocks the Hoyas with front court players. Thompson already has signed 7-foot center Patrick Ewing from Cambridge, Mass., and 6-7 power forward William Martin from McKinley Tech. The Hoyas, 20-12 last season, had strong guard play but were noticeably weak up front much of the season.

Dalton attended Fishburne for two years. Athletic Director James Hogg said he has done well academically since enrolling at the private school.

Thompson's last scholarship probably will be saved for Dunbar's 6-6 all-America forward Anthony Jones, who says he is deciding between Georgetown and North Carolina.