(1) In an action for commissions by a firm of real estate brokers, plea that defendant owners voluntarily consummated sale with purchaser produced by plaintiff firm on terms dissimilar to those specified by owners, though general, was sufficient to permit introduction of testimony, in absence of demurrer raising it. Hoddle v. Malone Real Estate Co., 196 S. W. 347, - Tex. Civ. App. - .

704, 704a. What are not depar tures.

"05 to 728c, inclusive. Examples on the question of burden of proof.