 On 15 September 1865 the first town in the Chubut colony was named Rawson, and the settlers went on to build the settlements at Gaiman and Trelew.The exact number of emigrants who sailed out to Patagonia on "Mimosa" remains uncertain.Although one of the original settlers, Richard Jones ("Berwyn"), maintained a register of births, marriages and deaths for many years, most of these original records were lost in the great flood in the Chubut Valley in 1899.