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 and the fact that the valuable manuscript collections were to be housed in "that dirty, uncomfortable city ... [with] not enough light to read by, and the books they already have are wretchedly kept" (written in 1901 about the Crawford MSS.) Mrs Rylands negotiated Deeds of Agreement with her neighbours to fix the heights of future adjacent buildings. The permissible height of the building was fixed at just over 34 feet, but it was suggested that it could be taller at the centre if there was an open area around the edges, at the height of buildings that had been