On the spot forming the principal entrance to the works, Mr. Samuel Harrison, in the year 1778, founded a manufactory in which he carried on his invention of steel split rings; but Mr. Harrison, who was an ingenious mechanic, also manufactured mathematical instruments, some of which were used by Dr. Priestley in his researches, and on one occasion he made a steel pen for Dr. Priestley, probably the first steel pen ever produced. Mr. Josiah Mason succeeded to the business of Mr. Harrison in 1823, and in 1828 began the manufacture of steel pens. For several years he gave his whole attention to improvements in the manufacture of steel pens, and Mr. Perry took out several most important patents for the improvement of steel pens, many of which have not been surpassed in ingenuity or in utility, and the principal among them, the so-called "double patent," is universally applied by the pen trade to a great number of pens to this very day. In 1842 Mr. Mason's attention was absorbed by the process of electroplating and gilding, at that time invented and carried on by Mr. Elkington, in partnership with whom he founded the great firm of Elkington, Mason & Co. For some years the production of pens flagged, but in 1852 a nephew of Sir Josiah Mason, Mr. Isaac Smith (deceased in 1868), gave a new stimulus to the manufacture of pens, and from that time the production gradually increased until it assumed its present proportions. The manufactory now covers nearly two acres; it occupies a whole square and fronts four streets. In the building fronting Lancaster Street (five stories high) the offices, warehouses and storerooms of finished goods are distributed. The underground floor forms a huge machine shop, in which all the presses, rolls, and general iron and machine work employed throughout the manufactory are produced by skillful mechanics. Behind the front building there are several courtyards and quadrangles, in the largest of which are placed in a row five double-flue boilers, each 20 feet long by 7 feet diameter, working at a pressure of more than 55 lb. to the square inch, supplying the steam power both for propelling the steam engines and for heating the manufactory. In the rolling mill, measuing 64 by 38 feet, three double-cylinder engines, working up to 293 indicated horsepower, give motion to 18 pairs of rolls, rolling four to six tons of steel per week. The largest workshops are the slitting and grinding rooms, 64 by 38 feet, the latter 24 feet high. In the slitting room 90 girls apply the last mechanical process to the manufacture of steel pens, in slitting them by presses of ingenious construction. In the grinding room more than 160 girls are busily employed cross and straight grinding steel pens on wood cylinders covered with emery. The room in which the finished pens are placed in boxes measures 54 by 30 feet, and in it alone are employed 50 girls boxing and labeling steel pens, or fitting penholder tips on handles