536 
DRS. T. ANDERSON AND J. S. FLETT ON THE ERUPTIONS OF THE 
“ Staff-Sergeant Crowiiurst, R.E., states he saw these patches at 8.30 a.m. on the same day, and that 
they never shifted their position until they disappeared at 1.30 p.m. All this leads me to conclude that 
a volcanic vent exists in the sea at this point. 
“ On the following day I think I detected a slight white patch of a similar sort in exactly the same 
place, but am not certain of this.” 
Grenada .—It having been reported that the lagoon, a sheet of water connected 
with the “ carenage ” or harbour of Grenada, had shown signs of volcanic activity, 
Dr. ANDERSOisr, at the request of Sir R. Llewelyn, the Govei'nor, visited the locality. 
The lagoon is a nearly circular sheet of water about a quarter of a mile iu 
diameter and about 25 feet deep in the centre, to the south-east of the carenage, and 
connected to it by a shallow, narrow channel about an eighth of a mile wide and onlv 
a few feet deep. As shown in Plate XVII., fig. 1, it is almost surrounded by hills, 
arranged in a manner that certainly at first sight suggests a similaritv to an old 
volcanic crater. 
They are all composed of beds of volcanic material, chiefly if not entirely scoria 
and ashes consolidated into tuffs and agglomerates. Closer examination, however, 
soon showed that the bedding does not follow the slopes of the surface, or even dip 
with any apparent reference to the centre of the lagoon. Many of the beds can also 
be traced into the massif of other surrounding hills, which obviously owe their present 
shape to denudation, and not to the mode of deposition of the beds. We therefore 
conclude that the lagoon and surrounding hills ov'e their configuration to the same 
general causes, and are not a cratei'. 
Pere Labat, who visted Grenada in 1705, gives a map in his book, ‘ Voyage aux 
Isles d’Amerique,’ in which the then town is shown on an isthmus between the 
carenage and the lagoon. The lagoon at that time ap|Dears to have contained oidy 
fresh water, and a brook throuo-h its isthmus was its onlv connection with the 
carenage. 
About the middle of the eighteenth century the town was removed to the opposite 
side of the carenage, and the isthmus became submerged, and remains as a reef. 
As this was the exact position of the disturbance in May, 1902, referred to below, 
it seemed desirable to ascertain the particulars of this submergence. The island 
was at the time in the occujDation of the French, and, through the good offices of 
the Colonial and Foreign Offices, the French Government have caused a search to 
be made in their archives, but without throwing any light on the subject. 
It having been reported to us that some sort of a volcanic eruption took place in 
the carenage of Grenada about 1867, we asked the authorities at the Colonial Office 
that search might be made in the records of that office for any entry hearing on the 
subject. Such search was made, and we were very courteously allowed to inspect 
tile original documents, which were chiefly cuttings from the newspapers of the 
period. As they are correctly summarised in the following e.xtract from ‘ The 
Grenada Handbook for 1897,’ it is unnecessary further to particularise them :— 
