The _Great Eastern_ was intended for the Indian and Australian route by the Cape of Good Hope. The result of large experience in steam navigation has proved that the size of the ship, (when steam is used), ought to be in proportion to the length of the voyage. Mr Brunel, the talented engineer to whose genius and perseverance this monster ship owes her existence, acting on this principle, calculated that the voyage to Australia and back being 22,500 miles--a vessel of 22,500 tons burden, (or a ton burden for every mile to be steamed), would require to be built, capable of carrying fuel for the entire voyage, it being impossible, without incurring enormous expense, to procure coal for such a vessel at intermediate ports. The Eastern Steam Navigation Company undertook the herculean work. The total cost of construction was estimated at 804,522 pounds. Mr Brunel prepared the designs. A spot of ground was chosen on the banks of the Thames, in the building-yard of the company at Millwall, and the building was commenced, on the lines laid down by Mr Scott Russell, on the 1st of May 1854. Every minute detail of the arrangements and building of this wonder of the world is fraught with interest. The mere preparing of the ground to receive her enormous weight was calculated to fill the minds of men with astonishment. Her supports and scaffoldings, and the machinery by which she was ultimately launched, taxed the skill of her engineers even more than her construction. A very town of workshops, foundries, and forges sprang into being round her hull; and as this rose, foot by foot, in all its gigantic proportions, the surrounding edifices dwindled down into insignificance, and the busy population of artificers clustered upon her like ants upon a prostrate monarch of the forest-trees. The hull of the _Great Eastern_ is built entirely of iron, and is 680 feet in length, 83 feet in breadth, and 60 feet in height from keel to deck. It is divided transversely into ten separate compartments of 60 feet each, rendered perfectly water-tight by bulk-heads, having no openings whatever lower than the second deck; whilst two longitudinal walls of iron, 36 feet apart, traverse 350 feet of the length of the ship. The mind will be better able to realise the magnitude of these dimensions if we add that the _Great Eastern_ is six times the size of the Duke of Wellington line-of-battle ship, that her length is more than three times the height of the Monument, while her breadth is equal to the width of Pall Mall, and a promenade round the deck affords a walk of more than a quarter of a mile.