According to the Wikipedia description of Canfield, "cards on the tableau are also moved one unit, provided that the entire column has to be moved". In other words, this suggests that if you move a sequence of cards from one column to another, that sequence must constitute the entire column being moved, rather than an arbitrary number of cards from the bottom of a column.
However, I can't find any other reference to this restriction. In other books of card games I have referenced, they seem to imply simply that arbitrary valid sequences can be moved from one column to another. Can anybody provide a source for the more restrictive version of the rule mentioned in the Wikipedia article?
(My question is hence similar to this question referring to movement in Klondike, but applied to Canfield.)