In this engraving we have a view of a new frigate, with only her lower masts in, lying alongside of the _Topaze_ rigging-hulk. The latter vessel--which now presents so clumsy an appearance, from her bows and sides being sheathed with a stout doubling of timber, and from a wooden house being built over her stem--was formerly a French frigate, and, when she first came into our possession, she was much admired by nautical men for the beauty of her build. Further in the distance, to the right, is seen a first-rate lying off the Dockyard Quay, partly rigged; and, beyond her, are perceived the immense wooden roofs which cover the building-slips. The line of building to the right is the rigging-house, and the tower erected above it is the Dockyard Semaphore. On the extreme right, towards the front, is seen the forepart of a mooring-lighter, with one of the numerous spar-booms lying afloat near the Common Hard. The original picture was exhibited in the Gallery of the British Institution, where it excited general admiration. The great naval depôt at Portsmouth is partially described in connection with other engravings in this work, and we have therefore thought it might be interesting to occupy our present space with some details respecting the peculiar mode in which one very important portion of the rigging is manufactured in this yard, and which forms a principal object of curiosity to all persons visiting it. We allude to the machinery for manufacturing blocks, invented by Mr. Brunel, the celebrated engineer.