On Friday the 29^th the public is invited to attend a sweet and lovely free concert in Winthrop Park at 4:45 p.m. with a performance by the Uxbridge Secondary School from Ontario, Canada.  The Harvard Square Business Association is pleased to sponsor this musical performance, consisting of 45 well-traveled students in grades 10 - 12.  The Uxbridge students have played to audiences in New Orleans, Nashville, Orlando and in cities throughout Europe and will be in historic Winthrop Park on Friday afternoon to enchant and delight.