Extracts from Letters Addressed to Professor Henslow

Abrothos abundant Amongst appears Beagle bed of recent believe belong bones breccia Buenos Ayres CAMBRIDGE PHILOSOPHICAL SOCIETY Charles Darwin chiefly Chiloe climate coast of Patagonia collected colour corallines Cordilleras Crustaceæ curious Darwin dykes elevation enormous examined existed FALKLAND FALKLAND ISLAND feldspar Flustra fossil gemmule genus geology grand eastern chain hundred miles insects interesting large animal lavas Lyell Mastodon Megatherium meiocene Meldonado Mendoza minute modern shells MONTE VIDEO naturalist nearly November observations pamphlet Patagonia Patagonian formation pelagic Peninsula of Tres pitchstone polypi porphyries porphyritic conglomerate Portillo pass produced PROFESSOR HENSLOW quartz recent shells Rio Negro Rio Plata sand hillock sandstone silicified slate species specimens St Fé St Jago St Julian structure tertiary plain tertiary strata thirteen hundred feet thousand feet thick thousand or seven Tierra del Fuego tion traversed trees Tres Montes underlying granite upheaval Uspellata Valdivia VALPARAISO viviparous vulture's head wild potatoe Zoophites