 Alleyne's next invention was the two high reversing steel mill patented in 1870, which used two steam engines to allow metal ingots to be repeatedly rolled to get the correct size and section.With this technique the steel did not have to be moved to re-enter the rolling process but merely had to be moved back into the rolling machine once it had passed through.There was also an extensive brickworks for railways, thousands of factories and domestic dwellings.