"... he is not disentitled to be paid compensation by reason of the " supervention of a disease of the heart. It cannot be said of him that " partial incapacity for work has not resulted and is not still resulting " from the injury. All that can be said is that such partial incapacity " is not still resulting ' solely' from the injury."
" If, however, the existing incapacity ought fairly to be attributed " to a new cause which has intervened and ought no longer to be " attributed to the original injury, it may properly be held to result " from the new cause and not from the original injury even though, but " for the original injury, there would have been no incapacity."
" In such a case, if the arbitrator is satisfied that the incapacity would " have wholly ceased but for the omission, a finding of fact that the " existing incapacity results from the new cause, and not from the " injury, will be justified."
" Because the injuries inflicted in the second accident were super- " imposed upon the then residual effects of the injuries inflicted in the " first accident, it is a matter of the greatest difficulty to determine what " damages should be awarded for each set of injuries. The plaintiff " should not receive more in respect of the first accident than he would " if the second had not occurred, nor should be receive less because it " did occur ... I think that the way in which justice can best be done " here is: (a) to assess as best one can what the plaintiff would have " recovered against the Thiessens had his action against them been " tried on April 22, 1966 (the date before the second accident) and to " award damages accordingly; (b) to assess global damages as of the " date of the trial in respect of both accidents; and (c) to deduct the " amount under (a) from the amount under (b) and award damages " against Lalibert in the amount of the difference. I think that nothing " I have said in this paragraph is inconsistent with Baker v. Willoughby " (1968] 2 W.L.R. 1138 or any of the cases referred to there."