He continued to exhibit new works throughout the 1970s and 1980s and in the 1990s .
In 1973 , at the age of 61 , Mazitis retired from Smiths Industries to devote the rest of his life to his art .
Mazitis continued to exhibit new works throughout the 1970s and 1980s and in the 1990s .
In 1973 , at the age of 61 , Mazitis retired from Smiths Industries to devote the rest of his life to his art .