Microlithic industries have been known from the Pennines for several generations, and their stratigraphical position at the base of the peat was established by Dr H. Colley March in the Marsden area as long ago as 1883. Although many collections have been made, however, it must be confessed that much less scientific information has been gained from detailed observation than might have been. An outstanding exception to the general rule was the work of Francis Buckley of Greenfield on upland sites, mainly between 1250–1500 feet above sea level on the high ground west of Marsden, during the years immediately following the first world war. Of special relevance to the subject of the present paper was his recognition of concentrations of microlithic material in conjunction with remains of fire-places and his distinction of a basic typological division between ‘Broad-Blade’ and ‘Narrow-Blade’ microlithic industries in the Pennines. The first part of the present paper is concerned with the excavation of a settlement structure and with the description of the flint industry associated with it and the second deals specifically with the affinities of the Broad-Blade industry.