Provenance covers an object's complete documented history. An artifact may thus have both a provenience and a provenance. The provenance of works of fine art, antiques and antiquities is of great importance, especially to their owner. There are a number of reasons why painting provenance is important, which mostly also apply to other types of fine art. A good provenance increases the value of a painting, and establishing provenance may help confirm the date, artist and, especially for portraits, the subject of a painting. It may confirm whether a painting is genuinely of the period it seems to date from. The
Up to Now (autobiography) relating to other prominent figures such as the British statesman Viscount Grey. Shaw's book was the first of two autobiographies published in 1929 with the title "Up to Now". The second was by the American politician and four-time Governor of New York, Al Smith. As "The Times Literary Supplement" pointed out, the title promised more to come, but although Shaw lived on for another thirty years, he never published a sequel. In the late 20th and early 21st centuries, "Up to Now" continued to be used as a source for biographical works on Gordon Craig, Isadora Duncan and Ellen Terry.