of Medlock Iron Foundry, Manchester
1825 Listed as iron founders and hydraulic press makers, Medlock Foundry, Old Garret and Pritchard Street[1]
1830 Advert: 'HYDRAULIC PRESS MANUFACTORY.
GEORGE HARKER begs leave to return his most sincere thanks for the patronage he has received, and the support has been favoured with, and at the same time respectfully informs his Friends and the Public, that after several years experience he has been enabled to make many important improvements: he has brought forward the HYDRAULIC PRESS to that perfection, as to be enabled to apply it to many more useful purposes than that of Pressing and Baling Manufactured Goods. He likewise begs to state, that he has a new set of patterns, of all sizes, from a three inch to an eighteen inch ram, and will be enabled to supply those who may favour him with their orders for Presses, much lower than any other house in the trade, he employs the whole of his time to that branch the business.
Medlock Brass and Iron Foundry, Old Garratt, Manchester.'[2]