Task: Question Answering
Input (English): Passage: Etty considered Britomart Redeems Faire Amoret one of his major works.
Following its exhibition at the 1833 Summer Exhibition, it was exhibited in August of the same year at the Royal Manchester Institution. It was sold at this second exhibition for £157 (about £15,000 in today's terms) to an anonymous collector listed in Etty's records only as "Mr. L., Manchester". It was one of 133 Etty paintings exhibited in a major retrospective exhibition of his work at the Royal Society of Arts in June–August 1849; during this exhibition it was sold on to Lord Charles Townshend for a sum of 520 guineas (about £56,000 in today's terms).Etty died in 1849, having continued working and exhibiting up to his death, and continued to be regarded by many as a pornographer. Charles Robert Leslie observed shortly after Etty's death that "[Etty] himself, thinking and meaning no evil, was not aware of the manner in which his works were regarded by grosser minds". Interest in him declined as new movements came to characterise painting in Britain, and by the end of the 19th century the sales prices achieved by his paintings were falling below the original values. 
Question: What is the last name of the person whose paintings fell below their original values?
Output (English): Etty.