Many thanks Jim1,
I think they are brothers. The Edwardian one must be the older brother born 1819 because he outlived the younger brother (my 2nd G Grandfather David John Davis; Master Brushmaker who died in 1889 of bronchitis) because he didn't die until 1905. The lady he is with is obviously a Widow and I think it is her children behind the seated man who is the older and longer lived brother James Davis jnr. We, mainly I think they are the sons of the elderly gentleman (James snr b. 1795) dressed for business with the younger (much he was 55 and she was 48 when they married) seated lady clutching a bible I think because James must of died shortly after the photograph was taken in 1859 or 60.
If I could have another go it would be to ask if there is anyway of telling whether a photo was taken in Australia. We, I think the attached photo may be James Davis jnrs son Edward Davis who married Jane Fry in Victoria Australia.
I imagine it must have been quite warm under those lights especially in Victoria Australia.
NB/ Might the addition of colour as with the 1870s card stock one indicate that it was near the 1880s?