11.   Instead, she used secret drop points and messages in invisible ink.

12.   The allegations included such traditional spy tradecraft as invisible ink, secret drop points and mind-altering drugs.

13.   The Philippines is being used as a drop point by smuggling syndicate for delivery to other countries, police said.

14.   The plane encountered a light wind at the drop point.

15.   The rebels said the barge was seized for failing to off load food at drop points they controlled.

16.   He had several drop points arranged in parks in and around Washington.

17.   Two more Chinese nationals were detained as a bag was handed over at the ransom drop point in China, although no money was paid out.