"In the circumstances of the relationship between these parties it does not advance our inquiry into the determination of the rights of the mortgagor or of the obligations of the mortgagee to proceed in reliance on categorical concepts suggested by such labels as 'trust', 'agency', 'escrow', 'debtor-creditor', for it must be evident that the relationship here does not fall essentially under any one of such classical headings or any identifiable combination of them. Reasoning predicated on such concepts would accordingly be untrustworthy. We cannot, for instance, ground any conclusion on the use of the words 'in trust' in this particular mortgage clause. Resolution of the issues must depend rather on what rights and obligations the parties are found to have intended to create as manifested by the words they used in their written agreement, with parol evidence admissible to clarify ambiguities, if any, under recognised canons of construction.” (p.176) "
"Plaintiff acknowledges that the relationship between contracting parties must be determined by its real character rather than by the form the parties have given it where the public interests or the rights of third parties are involved."