Frederick Knudsen
c.1811 Born in Denmark
1841 Lived in Bristol, a chronometer maker[1]
1862 Patent on improvements in chronometers; employed by M. F. Dent
1871 A chronometer maker, unmarried, lodging in Brixton[2]
1879 A watchmaker, married Elizabeth Payne in Lambeth[3]
1881 Frederick Knudson 70, Chronometer & Watch Maker, lived in Brixton with his wife Elizabeth Knudson 28, Annie M. Knudson 1[4]
1891 Frederick Knudsen, chronometer maker, lived in Battersea with Elizabeth Knudsen, Annie Marie Knudsen[5]