13 very likely that the opening of the vessel into the sac was I still patent. On the 20th of October, ten months after his discharge, while the patient was lifting a truss of straw, his limb was in such a position that he produced much strain over the popliteal artery, and felt something give way in the locality of the tumour. The pain became suddenly very acute, but he continued with his work until obliged to desist, from the suffering endured in the leg. The patient now called upon Mr.

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... , with the idea that he had injured his joint, or was labouring under an attack of rheumatism.