Denver athletic club Mulls building, of new wing. 1951 To rebuild at $850,000 cost. Arson hint bared in new probe of fatal blaze. News de $ '51 p.5 Fire Dept. spikes story arsonist set D.A.-C. blaze. Post Je 8 '51 p.1 $1,000,000 annex planned. $1,200,000 repair job to start after dune 1. 1952 0 r