I think you're referring to the "Joanna Tissera Trust," founded by her! She only owned the Fort Land-Galle Face is a big exaggeration! Please do reply to my mail- firstname.lastname@example.org as to how your related to her! She willed the land to one Stephanus Gabriel Dias; who is my Great x 4 Grand father! I do not understand how he is related to Lady Tissera, but perhaps further study will tell!