Llwyd ap Iwan writes to his brother, Mihangel ap Iwan, to thank him for his recent letter and for forwarding the letters from home. He only recently returned home, having spent two months surveying the land between Telsin and Porth Madryn. He will soon be leaving on another journey southwards to survey the land in the Aethwy Valley. He will try to visit Buenos Aires in February or March. John Thomas Jones would like to know how much it would cost to graze some sheep on Mihangel's land on the Sagmati. Llwyd also asks Mihangel whether he knows the whereabouts of his instruments. They are probably in Rio Negro, unless Mihangel knows otherwise.