Thank you for your suggestions. Interestingly, he lived in Chorlton on Medlock, but always went to Manchester Workhouse rather than the Chorlton Workhouse.
His death was due to General Paralysis of the Insane for 1 year (which we now know was due to syphilis, but this wasn't found out until 1905, 3 years after his death). The 2nd reason was pneumonia 18 days and cystitis 1 day. So whatever he was suffering from when he went to the workhouse was not related to his death.
I had seen the Safety in Numbers download before, but forgotten about it. He's not one of the names listed, unfortunately. Some of the causes of the reason for admission seem bizarre by today's standards.
I suppose I'll never know the real reason for his workhouse admissions, although as the timings in each case were a year after the death of a wife, I suppose some sort of depression might account for the admissions.
Interestingly 2 of his daughters, one from his first marriage and one from his second both died as elderly spinsters. They would have been my gran's cousins and I think I met both of them. Certainly, I remember my mum talking about them and one died when I was 8 and the other when I was 11.
Lizzie