The Supreme Court held that the appellant lawfully re-entered and terminated the respondent's lease due to clear breaches of covenants, including non-payment of rent and unauthorized subletting. The Court found that the act of letting the property to a new tenant constituted constructive possession and lawful re-entry, which terminated the lease as between the parties, regardless of the Registrar's refusal to note the re-entry. The respondent's counterclaim for relief against forfeiture and possession was, in substance, an action for ejectment against the lessor, which is barred by section 18…