In some senses, you should think of New Horizons as a sentinel, because over the course of the next 10-15 years we're going to get some colossal telescopes that will be able to probe the Kuiper Belt properly for the first time.
And standing as a solitary sentinel over all this was an ancient porter, "whose function", admitted Montaigne, "is not so much to defend his door as to offer it with more grace and decorum", making an attack on it "a cowardly and treacherous business... it is not shut to anyone that knocks".
Cecil is a modest and reticent hero, and Forest Whitaker, in his white gloves and formal tux, his shoulders pulled back, is like a sentinel keeping guard over the nation's dignity.
Tragedy is a child in a wheelchair, or grieving parents standing sentinel over a flag-draped coffin.
Twitter's highly skewed follower/followee structure lends itself to an intuitive model of influence; yet, in a context like the Emerging Infections Network (EIN), a sentinel surveillance listserv of over 1400 infectious disease experts, developing a useful model of authority becomes less clear.
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Although, psilocybin would've enabled me to sit outside and talk to the life-size giraffe, composed of approximately 20,000 Legos, that maintains a sentinel-like watch over the Assembly Row shopping complex, and that would've been awesome.
A forty-foot example of the latter, in gleaming stainless steel, stands sentinel over an immense lawn, formerly a baseball field, outside his house.
Ancient junipers stand sentinel over a monument to Holliday that looks like a headstone framed by a petite wrought-iron fence.
Right at the center of town, where Main Street gave rise to a lofty hill, not one but three big white churches stood sentinel over a triangular patch of park dubbed God's Acre.
Today, in the ground floor of the Tara Tower, a former arsenal standing sentinel over the bridge's eastern end, I am watching a television replay – a grainy, flickering recording – of what happened next.
