Answer:
Armstrong and Lombard decide that the two murders were committed by Mr. Owen and determine to search for him.
Step-by-step explanation:
'And Then There Were None' is a mystery novel written by Agatha Christie. The novel is a story of 10 people who have been murdered on an island.
In chapter 7, after Mrs. Rogers was found dead, Armstrong and Lombard consult with each other trying to find who committed the two murders. After inspection, they suspected that these murders can not be a mere coincidence. They find that the two Indian figures have disappeared from the board and the two deaths correspond to the first two verses of rhyming.
Armstrong and Lombard, therefore, decides that the two murders were committed by Mr. Owen, the host, and decides to search for him.