Res judicata requires concurrent jurisdiction; a collateral finding in an earlier suit did not bind the later bond claim.

A prior finding is conclusive only when it was made by a court competent to try the later claim, meaning a court of concurrent jurisdiction. A collateral issue decided in an earlier suit for interest alone, where the principal debt was not then due, did not amount to res judicata in a later suit on the bond because the consideration issue was not the direct and substantial matter in issue. Section 13 of Act X of 1877 was read as reflecting existing Indian law without expanding it to make every prior determination binding. The earlier finding therefore did not preclude trial of the later claim on the merits.

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Issues: Whether the earlier decision on the amount recoverable under the bond operated as res judicata in the subsequent suit, and whether Section 13 of Act X of 1877 required the first court to be a court of concurrent jurisdiction with jurisdiction over the later suit.

Analysis: The earlier suit was for interest only, and the principal was not then due. The question whether the bond was supported by consideration arose only incidentally in that suit and was not the direct and substantial matter in issue. Section 13 of Act X of 1877 was construed as embodying the existing Indian law without widening it so as to make every prior determination conclusive. A prior decision can bind only where it is given by a court of competent jurisdiction in the sense of having jurisdiction over the subject-matter of the later suit, that is, a court of concurrent jurisdiction. A court deciding a smaller and different claim cannot conclusively determine a question for a later suit that it could not itself have tried.

Conclusion: The earlier finding did not operate as res judicata in the later suit, because the first court was not a court of concurrent jurisdiction for the subsequent claim on the bond. The orders of the courts below were reversed and the suit was remanded for trial on the merits in favour of the appellant.

Ratio Decidendi: For the purpose of res judicata under Section 13 of Act X of 1877, a prior decision is conclusive only if it was rendered by a court having jurisdiction over the matter in the subsequent suit, meaning a court of concurrent jurisdiction; a collateral finding in a suit on a different cause of action does not bind a later suit on the principal claim.

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