Quenched QCD near the chiral limit
  A numerical study of quenched QCD for light quarks is presented using O(a) improved fermions. Particular attention is paid to the possible existence and determination of quenched chiral logarithms. A `safe' region to use for chiral extrapolations appears to be at and above the strange quark mass. 
M. Gockeler, R. Horsley, D. Petters, D. Pleiter, P.E.L. Rakow, and G.   Schierholz