The appointment of the said arbitrators by Order in Council and their award in writing, shall be bind- Ing on Canada, save in case of appeal on question of law, in which case the final decision thereon shall be binding on Canada."
"9. In case of a vacancy by death or otherwise among the arbitrators, the same shall be filled in the same manner as the appointment was first made, any In such appointment to be approved of by the other two Governments."
The Honourable John A. Boyd, Chancellor of Ontario; the Honourable Sir Louis Napoleon Casault, Chief Justice of the Superior Court of Quebec; and the Honourable George A. Burbidge, Judge of the Exchequer Court of Canada, were appointed arbitrators, in accordance with the provisions of the said statutes, and an agreement of submission was entered into on behalf of the three governments, which provided that the following, among other matters, should be submitted to them:
" 1. All questions relating to or incident to the accounts between the Dominion and the Provinces of Ontario and Quebec, and to accounts between the two Provinces of Ontario and Quebec."
" The accounts are understood to include the following particulars:"
"
" (b) In the unsettled accounts between the Dominion and the two provinces the rate of interest and the mode of computation of interest to be determined." The accounts as rendered by the Dominion to the two provinces up to January, 1889, to be determined upon."