34. The requirement for a signed document.

The contract for the sale of land1 incorporating all the terms which the parties have expressly agreed, or where contracts are exchanged, one of the documents incorporating them (but not necessarily the same one) must be signed by or on behalf of each party2. Where the contract document incorporates another document by reference, it is essential that the parties' signatures are on the contract document3. Where a letter purported to constitute a contract for the sale of land and contained a reference to the plan enclosed with it, the letter was one document and the plan was another (the