The Priors held a mansion in the middle of Elswick which was later occupied by Elswick Hall. Having been rebuilt a number of times, the last rebuild took place in 1810. The grounds of Elswick Hall became Elswick Park in 1881. Elswick changed significantly in the late 19th century with the extension of the railway from Carlisle to Newcastle in 1839 and the establishment of Armstrong's manufacturing works in 1847. Population increased rapidly during this period, from about 300 in 1801 to 59,165 in 1901. Tyneside flats were built in the area around Scotswood Road to accommodate the workforce.