Writing literary criticism as a collaborative act is a complex operation. It requires similar interests, similar styles of writing and above all a similarity of critical perspective which must be neither so narrow as to inhibit original thinking nor so broad as to allow real differences to show. Even parallel lines of thought can follow tracks different enough to be embarrassing when the aim is to present a coherent and unified view of the subject. When the writer is a regional figure with a metropolitan publishing history the strain of diversity can be acute.
Gurr, Andrew, Katherine Mansfield: The Question of Perspectives in Commonwealth Literature, Kunapipi, 6(2), 1984.