1837 - born St George's, Bloomsbury, Middlesex, son of a clergyman, Joseph Edwards;

by 1841 - attended Collegiate School, St Margaret (East), Leicester

1860s - located at 20 Baker Street, London;

1864 - publication of 'Portraits of Men of Eminence'

c. 1867 - invented the Heliotype modification to the collotype process, published books and stereographs

1871 - lived at 23 Kilburn Square, Willesden, recording his occupation as Heliotyper

1885 - emigrated to the United States