Typically, the use of ellipses indicate that there is a small pause that the reader should take before reading more. usually ellipses are used for dramatic moments, to help build suspense, or sad moments in a story.
Answer:
answer in the explanation. In the future, please take a better photo so that we can see the hole frame. Thanks!
Explanation:
The cool grey sky was alight with obsidian wings. Through the rustle of the mournful trees, a slight whisper could be heard from the small clearing. A collection of ghastly figures, clad in white smocks and masks, crouched there. Amid the dead grass, glass bottles, and cotton wabs, there was an air of secrecy about the group of workers. Nervous glances towards the treeline and the uncomforatble shifts of plasctic coated shoes were evident as they rushed through their work. The crows screamed in unison, almost echoing the wrath of nature towards these self proclaimed "men of science". The wind picked up, howling as they hastened the pace of their sickly blue gloves. The group hurried to collect data and samples as the darkness creeped in around them.
This website has information on forms of Human observation to be pretty broad. It doesn't have anything specific with Bolivian villagers or there looms.
http://www.psychologydiscussion.net/behaviour/7-methods-of-studying-human-behaviour/540
I think there is a shift at “...assured him”. From reading the beginning, you would think the person is under arrest, “stay where you are”. But, the sentence goes on to say that the police officer ‘assured’ him that. He could’ve been in danger, so the officer was telling him that help was on the way, just stay put.
Go back to the text and re-read a passage where Watson made a discovery. If Sherlock praises him, you've got your answer. I'm sorry if this wasn't much help, but I don't have any text to go off of.