Morning Susan..Jeremy knew which side he bread was buttered on as regards taking an interest in farming. He'd have seen it as a job for life,,and he'd have been " master of all he surveyed ".
Taking into consideration that he was only 24 at the time,,and an immature one at that,,the tragedy would have shocked him to the core deep down,and he'd have found that he'd gained such a huge resposibility overnight.
Nobody made allowances for his state of mind at that time,,they were too busy looking at his every movement to try and pin-point the least little hint that he could be " putting on his mourning face,,pretending to cry,,looking to see how others reacted,etc etc " absolutely disgusting. After all their " surveillance of him,,none of that lot looked as though they were in mourning,,too busy concentrating on what Jeremy was doing.