The twilight's first gleaming refers to dawn, as the sun rises.  The twilight's last gleaming refers to dusk, as the sun sets.

Daybreak and sunup are two of over 500 synonyms for dawn.

https://www.powerthesaurus.org/dawn/synonyms

Sundown and gloaming are two of almost 400 synonyms for dusk.

https://www.powerthesaurus.org/dusk/synonyms

Break in "break of dawn" is used to mean undergo a change or enter a new state.  Find full definitions of break at https://www.google.com/search?tbm=bks&hl=en&q=break+change#q=define+break&hl=en  Using that pattern, break of dusk would make sense, although I've never seen it used.  Crack of dawn is common.  Gathering or falling may refer to dusk.

Populus section Aigeiros is a section of three species in the genus Populus, the poplars.  Like some other species in the genus Populus, they are commonly known as cottonwoods.  The species are native to North America, Europe, and western Asia.  The section is named for Aigeiros, East Macedonia in Greece.  They are large, deciduous trees 20–45 m tall, distinguished by thick, deeply fissured bark and triangular-based to diamond-shaped leaves that are green on both sides (without the whitish wax on the undersides of balsam poplar leaves) and without any obvious balsam scent in spring.  An important feature of the leaves is the petiole, which is flattened sideways so that the leaves have a particular type of movement in the wind.   Cottonwoods are widely grown for timber production along wet river banks, where their exceptional growth rate provides a large crop of wood within just 10–30 years.  The wood is coarse and of fairly low value, used for pallet boxes, shipping crates, and similar purposes where a cheap but strong enough wood is suitable.  They are also widely grown as screens and shelterbelts.  Many of the cottonwoods grown commercially are the hybrid of eastern cottonwood and black poplar, Populus × canadensis (hybrid black poplar or Carolina poplar).

Cottonwood bark is often a favorite medium for artisans. The bark, which is usually harvested in the fall after a tree's death, is generally very soft and easy to carve.   https://en.wikipedia.org/wiki/Populus_sect._Aigeiros

Paraphrases from Dead Silence, a novel by Randy Wayne White  To not be stupid you don't have to be a genius.  In Sag Harbor, the superrich don't talk to cops--the cops go straight to their attorneys.  I never would've learned to skate if it wasn't for thin ice.

The 75 Best Books of the Past 75 Years by Ann Patchett   When Parade asked me to compile a list of the best 75 books to celebrate the magazine’s 75th anniversary, my first answer was, “Not a chance!”  I could picture the mountains of furious letters complaining about all the great works of literature I’d left off.  But when I asked the staff at Parnassus Books, the Nashville store I co-own with Karen Hayes, to take it on as a group project, they were game.  What we discovered in the process is how wildly we disagree about everything, except how much we love books.  We wanted novels, sure, but we also wanted picture books, science books, histories and young adult novels.  We wanted things that were old, like The Old Man
 and the Sea, but also things that were hot off the press, like When Breath Becomes Air.  The most important thing about creating any list is figuring out ways to narrow it down, so we decided to choose 75 books from just the last 75 years (sorry,Grapes of Wrath, you just missed the cut) and books written only by North Americans, because if we opened it up to the world we would miss plenty of gems out of sheer ignorance and wind up with a lot more than 75 books!  That seemed like a reasonable solution until we realized that meant leaving off Harry Potter, a deal breaker for half of our staff, so we defaulted to books written in English.  Behold, a mash-up of a list that exemplifies the passionate convictions of 17 booksellers.  Are they the best 75 books from the past 75 years?  Judge for yourself.  http://parade.com/485659/annpatchett/the-75-best-books-of-the-past-75-years/

Names for food in British and American English by Simon Thomas  http://blog.oxforddictionaries.com/2016/06/names-for-food-in-british-and-american-english/

candescent  adjective  glowing or dazzling from or as if from great heat  http://www.merriam-webster.com/dictionary/candescent

incandescent  adjective  1.  white or glowing because of great heat  2.  producing bright light when heated  3.  very impressive, successful, or intelligent  http://www.merriam-webster.com/dictionary/incandescent

foot-candle  noun  a unit of measure of the intensity of light falling on a surface, equal to one lumen per square foot and originallydefined with reference to a standardized candle burning at one foot from a given surface.  http://www.thefreedictionary.com/foot-candle 

Minimum Illumination Intensities in Foot-Candles from Occupational Safety & Health Administration  https://www.osha.gov/pls/oshaweb/owadisp.show_document?p_table=STANDARDS&p_id=10630

Standards for interior lighting from International Organization for Standardization  (ISO)  http://www.iso.org/iso/iso_catalogue/catalogue_ics/catalogue_ics_browse.htm?ICS1=91&ICS2=160&ICS3=10

Robert Nye, who died aged 77 on July 2, 2016, was a writer who, although better known for his novels, wanted to be remembered for his poetry.  That may yet be the case.  Nye’s poems would appear and reappear in slim volumes, as if he spent much of his career revisiting and revising them.  He held true to Yeats’s notion that unless these pieces seemed like a moment’s thought, “Our stitching and unstitching were as nought”.  At their best, his poems have a timeless quality, particularly in his poems about love and the end of love.  On the other hand, his novels can often appear as though they are situated in specific periods of the past.  The best known of those, Falstaff (1976), which won the Hawthornden Prize and the Guardian Fiction Prize, was not the only one to be based on Shakespeare’s England; but Nye could not easily resist references to topical concerns, such as when Falstaff addresses the 1970s’ preoccupation with devolution (which he calls “Devil’s Lotion”).  Although Nye was unlike Falstaff, the tone in which he presented the anti-hero’s “memoirs” was by turns expansive and introspective, in a way that reflected the author’s own complex personality.  In his poems, Nye was quick to puncture the bubble of inspiration.  One has his grandmother--“grandam”--listening to a nightingale whose “passionate song” is “Keatsian and long”.  “Then, when sufficient nightingale she’d heard, / Cried out:  Right!  Just you bugger off, you bird!”  http://www.telegraph.co.uk/obituaries/2016/07/07/robert-nye--obituary/

http://librariansmuse.blogspot.com  Issue 1495  July 11, 2016  On this date in 1798, the United States Marine Corps was re-established; they had been disbanded after the American Revolutionary War.  On this date in 1804, Vice President of the United States Aaron Burr mortally wounded former Secretary of the Treasury Alexander Hamilton in a duel.