12 GEOLOGICAL RECONNAISSANCE OF THE DOMINICAN REPUBLIC. 



and then, by the time the topographic maps are available, more reliable geologic mapping 

 will be possible than would be the case without a preliminary examination of the area 

 and office study of collections made during such an examination. 



About the time the letter containing this paragraph was dispatched Rear 

 Admiral Knapp was succeeded as Military Governor by Rear Admiral 

 Thomas Snowden, who acted favorably upon the recommendation of the 

 Director of the United States Geological Survey. 



The preliminary arrangements having been made, the Geological Survey 

 party — Messrs. D. D. Condit, Wythe Cooke, C. P. Ross, and I — left New 

 York for Santo Domingo City on March 24, 1919, and arrived there on the 

 morning of April 5, after making reconnaissance examinations around 

 Puerto Plata, Sanchez, and San Pedro de Macorfs. On reaching the city I 

 reported to Admiral Snowden and he referred me to Lieutenant Com- 

 mander Baughman, who helped to complete the preparations for the 

 geologic field work. 



FIELD WORK. 



The original plan comprised reconnaissance examinations of the Province 

 of Seibo, the Samana Peninsula, the Cordillera Septentrional, the Cibao 

 Valley, the main Cordillera Central along at least three different routes, 

 and the provinces of Azua and Barahona, including the Enriquillo basin. 

 This plan was carried out, except that the Province of Seibo was not visited 

 at all and that the Samana Peninsula was examined only along its south 

 shore and at its west end. 



The itinerary of the party was as follows: On April 11, Messrs. Condit, 

 Cooke, Ross, and I, in company with Lieutenant Colonel Glenn S. Smith, 

 who has charge of the topographic surveys of the Republic, left Santo 

 Domingo City by automobile for Hatillo, which is about 28.5 kilometers 

 from the city, on the Carretera Durate. At Hatillo we took a pack train 

 by way of El Madrigal, Sabana Grande, and Bonao to El Pino, at the north- 

 ern foot of Loma Miranda, whence we went to La Vega, arriving there on 

 April 15. At La Vega the party divided, Messrs. Cooke and Ross going to 

 Cotui, Hatillo, Maimon, Cevicos, and Villa Rivas, whence Doctor Cooke 

 went to Sanchez by train to do several days' work at the west end of Samana 

 Peninsula, while Mr. Ross worked westward along the southern foot of the 

 Cordillera Septentrional toward Santiago de los Caballeros. Colonel Smith, 

 Mr. Condit, and I went to Santiago, and the next day Colonel Smith and I 

 started by automobile for Port-au-Prince, Haiti, while Mr. Condit made 

 geologic studies from Tabera, at the northern foot of the Cordillera Central, 

 across the Cibao Valley and as far north in the Cordillera Septentrional as 

 Bajabonico, where his work connected with that carried southward from 

 Puerto Plata. 



Colonel Smith and I separated in Port-au-Prince, and I returned to 

 Santiago by automobile, arriving there April 26. Messrs. Condit, Cooke, and 

 Ross soon joined me at Santiago, and on May 1, after some examinations 



