Mette, her daughter Kersten Christensen Erickson, son-in-law Marcus Erickson, and their daughter Kersten initially started with the 1857 Christen Christiansen company and are listed on that roster, but she, her daughter and son-in-law stayed in Florence for one year and came in the 1858 Iver Iversen Company. They are listed on the Iversen roster as M. Eriksen and K. Erickson. Her granddaughter, Kersten Ericksen continued with the 1857 Christian Christiansen company.
In some sources her given name is spelled "Mette Christina". Denmark baptism records provide evidence for her birth date. Further research is needed to locate adequate evidence for her date of death.