In Castling, the King must be moved first, or before the Rook is quitted.

The king may move in any direction, only one square at a time, except in castling.

His “castling” privilege is a European invention; but he formerly leaped two and even three squares, and also to his Kt 2nd.

After castling, it is generally proper not to move the Knight's Pawn that is before your King, until you are obliged.

This variation serves to prove that your castling on the 5th move is less advisable than the move of 5.

White wants to keep the Knight pinned, but it was more important to prevent Black from Castling immediately.

She next noticed that he had a very odd way of handling the pieces when castling or taking a man.

In Castling it is always best to move the K first to show clearly that Castling is the move intended.