Civil Practice & Procedure  Doctrine of Res Judicata – Who is entitled to the residuary estate – Fit and proper person to apply for Letters of Administration with Will Annexed – Section 20 of the Wills Act – Intestates’ Estates and Property Charges Act – Declaration of Paternity – Status of Children Act– Sections 7 (1) (b) and 10 (2) of the Status of Children Act – Costs – Court’s power to vary or revoke Orders made