Listed as an artist in drawing and landscape in the 1851 Census for Cornwall, George P Marrack's address was given as either 1 Regent Square, Madron or 1 Morrab Place, Penzance. At the date of the census he was 20 years old and unmarried, the Falmouth-born son of Mary Marrack, innkeeper. The Slater's Directory of Cornwall (1852/53) described him as a landscape architect. Later he became a victualler.
A correspondent (2019) has been in touch with further information obtained while researching his ancestor George Marrack, who emigrated to Australia, and subsequently moved to the USA, settling in San Francisco.
Drawing and landscape painting
Census of 1851 (GRO)
Hardie (2009) Artists in Newlyn and West Cornwall (p336)