Which action invalidates the contract Kyle signed?

It is not indispensable that a contract for a mortgage should be executed in the ... Breach of promise of attorney to see debt of husband paid will not invalidate ... no obligation on the grantor, and the delivery is not conditioned on his signing it, it is ... Kyle v. Hamilton, 6 Cal. Unrep. 893, 68 Pac. 484. In an action of foreclosure ...