force an investigation of the accounts and cross-claims between them and the Caravel Company Incorporated.
Now, the term "bill of exchange" is defined, both in the Instru- ments Act and in the Bills of Exchange Act 1909 in the same words as are contained in the Bills of Exchange Act 1882 of Great Britain:
"A bill of exchange is an unconditional order in writing addressed by one person to another signed by the person giving it requiring the person to whom it is addressed to pay on demand or at a fixed or determinable future time a sum certain in money to or to the order of a specified person or to bearer." "The sum payable by a bill is a sum certain
although it is required to be paid with interest " (see Instruments Act 1915 (Vict.), secs. 4, 10 Bills of Exchange Act 1909, secs. 8, 14).
The distinction between interest recoverable under the contract and as part of the debt and interest recoverable as damages must be borne in mind. The Bills of Exchange Acts themselves recognize the distinction (see Instruments Act (Vict.), sec. 10 Bills of Exchange Act, secs. 14 (3), 62). Clearly the interest dealt with in sec. 10 of the Instruments Act and in sec. 14 of the Bills of Exchange Act is that required by the contract to be paid. Clearly also these sections are dealing with the certainty of the sum payable. So far as that sum is concerned, certainty is not destroyed because a definite rate of interest is not specified. The same conclusion seems to have been reached before the Act (see Warrington v. Early 1 ), possibly be- cause the promise implied by the law was to pay a reasonable rate of interest, understood, in England at all events, from usage or the custom of merchants, or because of the usury laws or the practice of the Courts, as £5 per centum (see Byles on Bills, 15th ed., p. 444; Chalmers on Bills of Exchange, 8th ed., p. 30 Halsbury's Laws of England, vol. II., p. 468).
The 'sum certain" must, however, if the document is to con- stitute a bill of exchange, be payable on demand, or at a fixed or determinable future time. "Certainty," as Ashhurst J. said in Carlos v. Fancourt 2, is a great object in commercial instruments; and unless they carry their own validity on the face of them, they are not negotiable." Now, the document under consideration did
1(1853) 2 El. &Bl., 763.
2(1794) 5 T.R., 482, at p. 486.