362 TEE ZOOLOGIST. 



almost exactly the identical route followed by Wallace nearly 

 sixty years ago. 



Perhaps I should remind the reader of Wallace's stay in 

 Borneo ; this lasted from November 1st, 1854, to January 25th, 

 1856. His travels were confined to the western portion of 

 Sarawak, the first four months being occupied with excursions 

 from Kuching, the capital, to various places on the Sarawak 

 river. His essay " On the Law which has Eegulated the Intro- 

 duction of New Species" (which preceded the historic essay of 

 1858, from Ternate) was written at Santubong in February, 

 1855. In March, 1855,* he went to Sadong, where a coal mine 

 was being opened up. This is situated near the river of that 

 name, which lies some twenty miles east of the Sarawak river. 

 Here he remained nine months, returning to Kuching at the 

 end of the year 1855 by a route through the interior, which took 

 him to the source of the Sadong river, through the country of 

 the Land- or Hill-Dayaks, and thence across the watershed to 

 the source of the Sarawak river ; down this to Kuching is a 

 bare two days' journey. The whole excursion, fully described 

 in Chapter V. of the ' Malay Archipelago ' (pp. 101-116, 1st ed.), 

 occupied some nine days (November 27th, 1855, to about 

 December 5). The journey described in the present paper 

 covered nearly the same route, and took place in May, 1914. 



On Wallace's return to Kuching he made one more expedi- 

 tion up-river, this time to Mt. Serambu, where he spent some 

 four weeks in all before returning to Singapore in January, 1856. 



The accompanying sketch-map shows the places visited by 

 Wallace, and the circular tour made by us in 1914. 



The small Government launch steamed down the river, 

 leaving Kuching, the capital, punctually at 8 a.m. on May 8th 

 with our party all on board — six Dayak collectors, a Malay 

 collector, Chinese cook, and two Europeans (B. in search of 

 Coleoptera and the writer). An hour-and-a-half to the mouth 

 of the river, three hours across a glassy sea to the east, and 

 then up the Sadong river for two hours brought us to Simunjan, 

 a Government station, where C, the Resident in charge, 

 received us for the night. 



* In the first edition of the ' Malay Archipelago ' the date appears as 

 1865. 



