Answer:
Roderick wanted to wait two weeks before they do anything with Madeline:
Because he doesn’t want doctors poking and prodding
Step-by-step explanation:
Madeline was suffering from one of the rare illness. Her last wish which she made was that she wanted to be kept in the family tomb before getting buried. Roderick who was Madeline's brother decides to keep Madeline in their house so as to keep her body away from any scientific examination. Since her disease was very strange the doctor wanted to learn about it by examining her body.