* If the instrument purports to transfer the lessee's estate for the entire remainder of his term it is an assignment, regardless of its form or the parties' intentions
* Conversely, if the instrument purports to transfer the lessee’s estate for less than the entire term, even for a day less, it is a sublease, regardless of the form or intention of the parties
* BUT SEE, Modern Rule (intention): in construing deeds or another written instrument, the cardinal rule is to ascertain the intention of the parties