Contract for sale of land -- delay by purchaser -- vendor serving notice to complete --

notice making time of the essence -- validity of notice to complete --whether service of

notice to complete on purchaser's attorney-at-law valid--effect of notice -- purchaser

failing to complete within time -- Rescission by vendor -- whether rescission valid --

whether purchaser entitled to specijic performance --; whether vendor entitled to

damages and recovery of possession -forfeiture of deposit