According to cousins, who was the leading exponent of french expressionist cinema?

Abel Gance who wrote, produced and directed the 1927 masterpiece Napoleon.

What is surrealist cinema ? name 2 films with directors and dates.

Surrealist cinema is a genre of fantasy films which were often set on alternate versions of earth as the audience knew it.

An Andalusian Dog (Salvador Dali, Luis Bunuel) 1929.