The show will include more than 300 works dating from the 1950's to the present.

It will include 40 works dating from 1960 to the present.

These works thus date from a century and a half after Patrick's death.

Two works - including one of the best - dated from last year.

Each of these breeds is described in works dating from the 17th century.

General scholarly opinion holds that a number of works dating back to 1524 are also by his hand.

Christie's will continue selling works dating from 1970 to the present in their own sale.

With most works dating from the 1970's and 80's, the show reveals an artist who really didn't hit his stride until after he was 50.

Opened in January, the collection comprises more than 4,500 works dating from 1883 to 1943.

Last week, the acquisitions committee approved several purchases of works dating from the 17th to the 20th century.