John Rylands manufacturers, and about the same time they erected a new spinning mill. The Ainsworth mills, near Bolton, and other factories were subsequently acquired. Joseph and Richard retired around 1839 and the death of their father in July 1847 made John Rylands sole proprietor. The business continued to expand and in 1849 a warehouse was opened in Wood Street, London. A great fire occurred at the Manchester warehouse in 1854 but the loss, although very large, was speedily repaired. By 1864 the warehouses were seven storeys high and extended all the way along New High Street (now High Street) in Manchester:
John Rylands Library has a crypt above which the building has two unequal storeys giving the impression of three. The ornate Deansgate facade has an embattled parapet with open-work arcading under which is a central three-bay entrance resembling a monastery gatehouse. Its two-centred arched portal has doorways separated by a trumeau and tall windows on either side. Above the doors are a pair of small canted oriel windows. Surfaces are decorated with lacy blind tracery and finely-detailed carving. The carving includes the "J. R." monogram, the arms of Rylands, the arms of Rylands' native town, St Helens, and those of five English, two