patent taken out in 1906 by Archibald McGregor, of Queensland (Fig. 542), recalls that of Murray
and Stuart, since it provides the diver with three separate dresses.
In this case, however, an ordinary diving-dress goes on first and
another similar dress last! Between the two are various separate
pieces of armour, to fit trunk, arms, legs and feet, none of these
being watertight. Twin-armoured air-pipes are fitted, and the diver
is further provided with an enclosing cage of open grillwork—
presumably to safeguard him from sharks!