On G.P. Kuiper's work on the stars of large proper motion

The author is preparing for publication a complete listing of the late G.P. Kuiper's spectral classifications of stars of large proper motion north of delta=-500. This work, resulting from his observations made at the Yerkes and McDonald Observatories some 35 years ago, has been only partially published; it is estimated that useful unpublished classifications exist for the order of 1000 stars. The background of his program and the procedures to be followed in making these data generally available, are discussed. (Auth.)