I thought I had this one done and dusted, but a friend has suggested an alternative answer to one of the four works - the person's final work of 1976 represented by the grid entry at 22 across. (It would replace the answer bottom left which has the same number of letters). It looks quite plausible, but the four I already have seem equally plausible or perhaps more so. Are we looking at a genuine alternative answer or just a red herring?