Complex sentence: Despite Anna Seward's despair at the loss of her friend, she and Honora had maintained regular correspondence and visits, which then suddenly ceased, an event that Anna blamed Honora Sneyd's father for.
Split into simpler sentences: Despite Anna Seward's despair at the loss of her friend, she and Honora had maintained regular correspondence and visits. However, these suddenly ceased, an event that Anna blamed Honora Sneyd's father for.