hiya,
the only way of finding why he died so young is to obtain a copy of his death certificate. Checking on any decendents of his will mean checking later census records(1881/1891 etc) and tracing his line forward.
It's a tall order, maybe posting again for Shaw decendents on a family history website may help.
His death cert will give the last place he was living, from that look at the 1881 census etc.
regards
Bri