THE EACES OF ALDABEA. 
19 
Dalrymple from the observations made in the boat ' Charles ' and tartan ' Elizabeth ' in 
1744, where, the author adds, " they found a great many Land-turtle much larger than 
those at Eodrigue." Our knowledge of the configuration of these islands is still so in- 
complete that it will be useful to reproduce Dalrymple's chart ; it is clearly faulty in 
its north-eastern portion (where the cliannel between the second and third main islands 
is omitted), but gives some idea of the smaller islets in the lagoon. 
AtDABEA (from Dalrymple). 
On applying to the Hydrographer, Capt. Evans, C.B., for more recent information^ 
he, with his usual kindness, directed my attention to an unpublished chart deposited by 
the late Admiral W, F. W. Owen in the archives of the Admiralty, and reproduced here 
(p. 20) with the permission of the hydrographer. It appears that the group was partially 
surveyed by Lieut. R. Owen, of H.M.S. ' Leven,' in 1824, which, Avith H.M.S. 'Barra- 
couta,' was engaged at that time, under the command of Capt. W. F. W. Owen, in the 
exploration of this part of the Indian Ocean *. This is at present the most reliable 
* See 'Narrative of Voyages to Explore the Shores of Africa, Arabia, and Madagascar, performed in H.M. 
ships " Leven " and " Barracouta," under the direction of Capt. W. F. W. Owen, E.N.' 2 vols. 8vo. Lond. 
1833. No complete and continuous detailed account of the work of those ships is given in that ' Narrative ;' 
and more especially I am unable to find Lieut. Owen's visit to Aldahra mentioned. 
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