At the storming of Buenos Ayres, Way led the right wing of the infantry brigade.
He took part in the disastrous attack on Buenos Ayres and in the capitulation on 6 July, and sailed for England on 30 July.
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Named Arroyo de los Buenos Ayres or Aires by the Spanish, the creek retained this name despite the arrival of the Americans and the 49ers for some time.
In 1839 he published Buenos Ayres and the Provinces of the Rio de la Plata, an account of the geology of the Buenos Aires and Río de la Plata region and his findings of mammalian fossils, presenting Megatherium bones which were assembled and exhibited in the Natural History Museum, London.