Mary Cook Thill;82;formerly of Perry Vue Ave.;Pittsburgh;died Wednesday;Sept.15;1976 at 7:30 p.m.at the Ivy Nursing Home;Pittsburgh;after a lengthy illness. She was born June 5;1894;a daughter of the late Mark and Alice Snyder Cook. Her husband was the late Gene Thill. Surviving are three cousins;Mrs.Sam (Betty) Bradley of Las Vegas;Nev.;and Mrs.Margaret Szymansky and Donald Bedsworth;both of Belle Vernon;and several second cousins. Friends will be received Friday from 2 to 4 and 7 to 9 p.m.at the Leonard J.Parzynski Funeral Home;626 Broad Ave.;Belle Vernon;where services will be held Saturday;Sept.18;1976 at 10:30 a.m.;the Rev.Allie A.Clayton;pastor of the Rehoboth Presbyterian Church;officiating. Burial will follow in Belle Vernon Cemetery. Tthe Leonard J.Parzynski Funeral Home is in charge of arrangements.