Ferguson should have known or realised that the risk of suicide is quite high once a person leaves hospital,as it's usually 3 or 4 months later that a victim will take his/her life by acting on impulse. One of the highest triggers is loss------which Sheila had suffered. Antidepressants and antipsychotic drugs also carry a risk of suicide and those taking them should be closely watched and monitored for behavioural problems particularly after a loss. Imagine how Sheila would have felt after parting from Colin,then to have more uncertainty about the futures of her sons ? No woman could go through such traumas unscathed whether they already had problems or not.
Then the loss of her babies before having the twins. This would all have exacerbated her present condition.
Sheila had no support whatsoever which I find appalling and unforgivable.
No wonder Sheila's notes were full of anger ! This is sadly typical of those whose thoughts expressed rage,hatred,vengeance and self-loathing,of how their inner thoughts reacted to their overall feelings before they take their lives. They show the intensity of their feelings then the relief after having been expressed/written.
Style of the handwritten notes aside,the content will go a long way in reaching a conclusion of Sheila's mind at the time of writing them.