Beall 1642; Wuerth 527, proof before edition of approximately 50, with extensive additions in charcoal. Signed and inscribed in pencil lower right: “Jo Pennell imp et del.”. Inscribed in margin lower right: “Coal Towering Breaker Tamaqua touched proof”; inscribed in margin lower left: “London 1921” and monogrammed in pencil: “DA”. A fine impression in fine condition aside from overall toning and slight foxing, with margins measuring between 1/2 and 2 inches all around; with inked fingerprints in the margins. Plate destroyed.