Detroit Greyhound Employees Federal Credit Union v. Aetna Life Insurance

Two quotations, dating back to 1886 and 1887 respectively, will serve to present for application to this case a mature rule of interpretive contract law:

“The facts and circumstances attending the making of a contract, are indispensable to a correct construction or interpretation thereof, and if it is ex-ecutory, and its terms uncertain or ambiguous, the manner in which the parties themselves have treated it, in carrying it into effect, is entitled to great weight as affording a practical construction which the parties themselves have placed upon its intent and meaning.” (Switzer v. Pinconning…