Haydn Jones era: 1911–1950 The Bryn Eglwys quarry was the primary employer in the Abergynolwyn district, so its closure caused significant distress. In 1910, local landowner Henry Haydn Jones was elected the Liberal Member of Parliament (MP) for Merioneth. He understood the importance of Bryn Eglwys, and at the end of the year he purchased the quarry company for just over £5000. The quarry re-opened in January 1911,Boyd 1965, pages 72–73 though Haydn Jones did not have capital to invest in the quarry. The first workings reopened were on the Broad Vein, which yielded relatively hard slate that was less popular and therefore difficult to sell. The lack of an available market for this output forced the quarry to switch to extracting softer slate from the Narrow Vein but, because Haydn Jones could not afford to open new workings into the Narrow Vein, he resorted to the dangerous practice of narrowing the columns that supported the roofs of the underground chambers. This practice had begun under McConnel's ownership and Haydn Jones continued it throughout his ownership of the quarry. A brief construction boom after the First World War saw production return to around per year.
Haydn Jones era: 1911–1950 The Bryn Eglwys quarry was the primary employer in the Abergynolwyn district, so its closure caused significant distress. In 1910, local landowner Henry Haydn Jones was elected the Liberal Member of Parliament (MP) for Merioneth. He understood the importance of Bryn Eglwys, and at the end of the year he purchased the quarry company for just over £5000. The quarry re-opened in January 1911,Boyd 1965, pages 72–73 though Haydn Jones did not have capital to invest in the quarry. The first workings reopened were on the Broad Vein, which yielded relatively hard slate that was less popular and therefore difficult to sell. The lack of an available market for this output forced the quarry to switch to extracting softer slate from the Narrow Vein but, because Haydn Jones could not afford to open new workings into the Narrow Vein, he resorted to the dangerous practice of narrowing the columns that supported the roofs of the underground chambers. This practice had begun under McConnel's ownership and Haydn Jones continued it throughout his ownership of the quarry. A brief construction boom after the First World War saw production return to around per year.