W G Helsby (snr) born Buenos Ayres Argentina 1828, was a photographer in Valaparaiso Chile for many years. He died in St Asaph Wales 1891. His son also Dr William George was born in Valparaiso Chile in 1853 and was also a photographer, eventually living in Denbigh with his father, WG jnr died in 1925.
The Helsby photographers had a studio in Valparaiso "Helsby" corner - a sketch of can be found on the Internet. Google Helsby photographers for more details.
The brothers,William, John, and Thomas Helsby, operated
a photographic studio in Valparaiso beginning in 1846.Carlos
Luis Rossell joined the studio in the late 1850s and bought the
business in 1866. John Helsby traveled to the Juan Fernandez
Islands aboard the yacht of Jose Tomas Urgenta and produced
photographs there around 1860.Almost certainly he is the
maker of these images of the Juan Fernanadez Islands.
Hope this is of help.
Peter Helsby