What is Taltarum's Case?

Legal Definition
Taltarum's Case is the name given to a 15th-century English legal case in the Court of Common Pleas that was generally thought to have established the operation of the common recovery. The latter was a collusive legal procedure designed to evade the statute De donis conditionalibus, and was for centuries an important element of English law of real property. The recovery operated to break an entail on freehold or copyhold property held in fee tail - which could not be freely sold or transferred - leaving it in fee simple, so that it could be freely sold or a new settlement arranged. Although recoveries had been used before the case to bar entails, the judges' extensive discussion of the principles involved meant that in succeeding centuries the common recovery's procedures, and even the names of some of the fictitious individuals involved in them, were modelled on the case.

Although traditionally known by the name Taltarum's Case, it was entered in the Plea Rolls as "Talcarn's Case", and it could be represented in contemporary style as Hunt v Smyth. The name of the individual referred to, one Thomas Talcarn of Godcote in Cornwall, was spelt Talcarn, Talcarum, or Talkarum, in the original documents, though never in the form "Taltarum" under which the case became famous.
-- Wikipedia
Legal Definition
A case reported In Yearb. 12 Edw. IV. 19-21, which is regarded as baving established the foundation of common recoveries.
-- Black's Law Dictionary
Legal Definition
An old English case out of which common recoveries arose.
-- Ballentine's Law Dictionary