288 CAPTAIN ELLIOT’S MAGNETIC SURVEY OF THE INDIAN ARCHIPELAGO. 
nity, which I was enabled to do through the kindness of Colonel Butte rworth,C.B., the 
Governor of the Straits, I proceeded, in May 1846, to Borneo, where 1 remained some 
time with my friend Sir James Brooke, K.C.B.,and making Sarawak my head-quarters, 
I took observations at several of the Dutch settlements on the western coast. From 
Borneo I proceeded to Java, where I passed ten months, and went on to Sumatra in 
August 1847; but from severe illness brought on through over-exertion in the magnetic 
survey of part of that island, I was forced to return to Singapore for medical advice 
in February 1848. At Singapore I remained for some weeks; during which time 
I was able to take a considerable number of observations of dip and of horizontal 
intensity; and early in April 1848 I again left Singapore, and visited successively, 
Pulo Labooan, Sambooanga in the island of Mindanao, and Keemah in the Celebes. 
From Keemah I proceeded to the Keeling or Cocos Islands, and from the Cocos re- 
turned to Batavia, whence I was on the point of proceeding to the eastward and to 
New Guinea ; when I received instructions which induced me to return to Madras, in 
consequence of having unfortunately very much exceeded the time allotted to me ; 
and thus an end was put to the Survey, which the liberal patronage of the Court of 
Directors of the East India Company had enabled me to undertake, and which I 
had hoped to render complete. I returned to Singapore at the close of the year 
1848; and here let me gratefully acknowledge, the kind and hospitable treatment I 
received everywhere from the Dutch authorities. No restrictions were placed on my 
movements ; I was allowed to proceed wherever I chose, and I rejoice at the oppor- 
tunity thus afforded me of recording my sense of their uniform liberality; nor can I 
omit mentioning my obligations to His Excellency Baron Rochussen, the Governor- 
General of the Dutch Possessions in the East ; to His Excellency General Van der 
Wevck, the Commander-in-Chief in Java, and to Captain Smitz, the Hydrographer, 
who rendered me very great service in his superintendence of the magnetic observa- 
tory during my occasional absence from Batavia. 
Quitting Singapore for the last time. I stopped at Penang on my way to Nicobar 
Island, which I was anxious to visit from its being in the immediate vicinity of the 
line of no dip and of minimum intensity. 
I then visited Moulmein, and from Moulmein proceeded to Madras, which I reached 
in June 1849, from which time till the month of October I was employed there in 
taking a complete set of absolute determinations, and of hourly magnetic observations, 
in which latter duty I received the kind aid of Captain Jacob, the Honourable East 
India Company’s Astronomer. Madras was my last station, and I there concluded the 
Survey. Having then to reduce and bring into shape an enormous mass of work, it 
occurred to me that the difficulties I should encounter in publishing in India a system 
of observation, combining the details of a fixed observatory with those of a magnetic 
survey, would be very great. I therefore applied for furlough, and came to England 
for the sole purpose of publishing my observations, after redueing them into as con- 
densed a form as was consistent with perspicuity. 
Since my arrival in England 1 have been in constant communication with Colonel 
