CHAPTER XII. 



Start on third expedition : Reach Sandy Point: Go by steamer to San 

 yidian: Revisit Lake Piieyrredon: Discovery of new and highly fossilif- 

 eroiis Cretaceous deposits : Deep depression in plains east of Mt. Bel- 

 grano : A snoiu storm : Revisit Mayer Basin : Return to Santa Cruz : 

 Make important collections of invertebrate fossils at month of Santa Crnz 

 River: Return to San yulian: Gallegos : The wreck of the Villarino : 

 Buenos Aires : Up the Paraguay River to Asuncion : Fossil bones at 

 Entre Rios : Asuncion : The interior of Paraguay : Return to Bitenos 

 Aires: Rio de Janeiro: New York: Different effects exerted on the 

 minds of Darwin and Hudson by the plains of Patagonia : Conclusion. 



ON my third trip I was again accompanied by Mr. Peterson, and 

 Mr. Barnum Brown, of the American Museum of Natural His- 

 tory in New York, also went with us in the interests of that 

 institution. We sailed from New York on the morning of December 

 ninth, 1898, just one month after my return. Our steamer was the 

 "Capac" of the Grace Line, bound direct for Sandy Point, where we 

 arrived on January tenth, 1899. From Sandy Point I went by steamer 

 to San Julian, while Messrs. Peterson and Brown went overland to Santa 

 Cruz by way of Gallegos. Between Gallegos and Santa Cruz they gathered 

 the various horses I had left at intervals along the road on my trip during 

 the previous winter and brought them to the latter place, where, as by 

 previous arrangement, we all met at a date that had been mutually fixed 

 and agreed upon. At San Julian I made a small collection of invertebrate 

 fossils from the marine beds that outcrop at Oven Point, and with a saddle- 

 horse and pack-mule and saddle set out to join my companions at the 

 crossing of the Santa Cruz River. 



From Santa Cruz we started for Lake Pueyrredon, following the same 

 route as that by which I had travelled on my last expedition. On this 

 last trip I had especially provided myself with extra saddle and pack- 

 animals, and, as there were two persons beside myself in the party, there 



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