linguistic:translation, quality:corruption, structural:summarization
Patent ambiguity

Patent ambiguity is that ambiguity which is apparent on the face of an instrument to any one perusing it, even if unacquainted with the circumstances of the parties. In the case of a patent ambiguity, parol evidence is admissible to explain only what has been written, not what the writer intended to write. For example, in Saunderson v Piper (1839), where a bill of exchange was drawn in figures for £245 and in words for two hundred pounds, evidence that "and forty-five" had been omitted by mistake was rejected. But where it appears from the general context of the instrument what the parties really meant, the instrument will be construed as if there was no ambiguity, as in Saye and Sele 's case (1795), where the name of the grantor had been omitted in the operative part of a grant, but, as it was clear from another part of the grant who he was, the deed was held to be valid.