1879-91 Postage Due Issue Collection, several hundred stamps and about a half dozens covers mostly on album pages, covers with some interesting incoming usages, one from Sing Sing, off cover stamp with many tough cancels including a study of red Boston propeller cancels, N.Y. precancels and others, fancies including star, red negative A, star & moon, etc., multiples; a nice lot for the specialist, From the Estate of the late John E. Du Pont. Estimate  $500 - 750. $0