how is Dr.seward left t deal with lucy?

Arthur writes to Dr. Seward, asking that he come and see Lucy. Her health is deteriorating, and Arthur is worried. Although concerned about his fiancée, he is suddenly called away to the side of his father, who is very ill. Dr. Seward goes to Lucy and reports to Arthur that he can find no cause of her illness. Dr. Seward writes a letter to his old mentor Abraham Van Helsing, a brilliant doctor with a vast knowledge of obscure diseases. Van Helsing makes a brief visit, unable to pinpoint the cause of Lucy's illness but visibly disturbed by Lucy's symptoms. He tells Dr. Seward to alert him to any changes in Lucy's condition.