“where a trustee acts under a discretion given to him by the terms of the trust the court will interfere with his action if it is clear that he would not have so acted as he did had he not failed to take into account considerations which he ought to have taken into account.”
“In a case such as this, where it is claimed that the rule in Hastings-Bass applies, three questions arise: (1) What were the trustees under a duty to consider? (2) Did they fail to consider it? (3) If so, what would they have done if they had considered it?”