By definition it does not cover problems whose solution are unknown or have not been characterised formally.

By his advice Benedict became a hermit and for three years, unknown to men, lived in this cave above the lake.

By the eighteenth century, Chianti was widely recognized as a red wine, but the exact composition and grape varieties used to make Chianti at this point is unknown.

By constructing a calibration curve of the ID of species ' pairs with known divergence times in the fossil record, the data could be used as a molecular clock to estimate the times of divergence of pairs with poorer or unknown fossil records.

By coincidence and unknown to both parties, the AUA was formed on the same day — May 26, 1825 — as the British and Foreign Unitarian Association

By unknown mothers:

By the late Republic, ludi were held on 57 days of the year ; an unknown number of these would have required full use of the Circus.

By December 16, the fleet had passed the Great Fish River ( Eastern Cape, South Africa )-where Dias had turned back-and sailed into waters previously unknown to Europeans.

* By unknown mothers.

By August, Ramsay could write to Rayleigh to announce that he had isolated a heavy component of air, previously unknown, which did not appear to have any obvious chemical reactivity.

By unknown mothers

By doing so, she protected not only herself but her children, who would have had greater opportunities if their mixed-race heritage remained unknown.

By an unknown wife Nikephoros I had at least two children:

By now, Michael Wilde and Rupert Lowe had replaced Leon Crouch as chairmen, and the new board brought in the relatively unknown Dutchman Jan Poortvliet as manager.

In June 1778 " By the ill conduct of his wife found it necessary to send her into Wales in order to work a reformation on her ", the cause of this appears to have been that Jane Nash " Had imposed two spurious children on him as his and her own, notwithstanding she had then never had any child " and she had contracted several debts unknown to her husband, including one for milliners ' bills of £ 300.

By the end of the summer, unknown assailants stole or demolished all five billboards.

By the time of its discovery, most scholars did not consider Apostle Thomas the author of this document and the author remained unknown.

By the series finale of the show, it was revealed that when the Beyonder and Madame Web rounded up Spider-Men from different realities, in the Scarlet Spider and Spider-Carnage's reality, Aunt May was dead along with Uncle Ben, but her cause of death was unknown.

By contrast, Spartan women enjoyed a status, power, and respect that was unknown in the rest of the classical world.

By his unknown mistress, James also left one illegitimate son:

By 1912, he effectively pressed for the establishment of a Harz National Park, without calling it such, in Der Harzer Heimatspark ( Verlag E. Appelhans u. Co., Braunschweig 1912 ), a brochure that has remained relatively unknown.

" By 2010, almost 20 years later, the estimated wealth of the Al-Sabah family is unknown, but many observers predict that it has tripled, or even quadrupled over the years, as the Al-Sabah's have the largest shares in almost all the blue chip corporations in the Western world, with tens of billions of dollars invested in companies from Citibank to Daimler AG to Merrill Lynch.

By her second marriage with Claude Dupin de Franceuil, Marie Aurore married in 1764 Antoine, comte d ' Horne ( 1735 – 1765 ), an illegitimate son of Louis XV of France by an unknown mother.

By the time Major Mills got his men back under control, the police had fired 114 rounds of rifle ammunition, and an unknown amount of revolver ammunition as well, not counting 50 rounds fired from the machine guns in the armoured car outside the Park.

By means of her mother, Catherine had a stronger legitimate claim to the English throne than King Henry VII himself through the first two wives of John of Gaunt, 1st Duke of Lancaster: Blanche of Lancaster and the Spanish Infanta Constance of Castile.

By contrast, Rabbinic Judaism subsequently took the opposite view, espoused by Hillel, the leader of the other major Pharisee school of thought at the time ; in Hillel's view, men were allowed to divorce their wives for any reason.

By his various wives and concubines Priam was the father of fifty sons and many daughters.

By the 16th century, men were known to rip up rosemary bushes to show that they, not their wives, ruled the roost.

; By other wives

By various wives eleven other children

By this sense of the word, Sif would appear to be, like Frigg and Freyja, a goddess of loveliness and love ; as attributes of Oðinn and Thôrr agree, their wives Frigg and Sif have also a common signification.

By 1498 the reforms of cardinal Francisco Jiménez de Cisneros were so fierce that even four hundred Catholic monks and friars fled to Africa with their " wives " and converted to Islam.

By 1837, some historians believe that Pendleton Morgan Harris had become one of the plural wives of Joseph Smith, Jr., founder of the Latter Day Saint movement.

By all accounts however, Khurram was so taken with Mumtaz, that he showed little interest in exercising his polygamous rights with the two earlier wives, other than dutifully siring a child with each.

By agreement between Joseph F. Smith and Julina, Smith was given his father's name, even though Joseph F. Smith's third and fourth wives had previously had sons.

By 1943 the laborious simulation calculations used electromechanical calculators of that time operated by human " computers ," mostly wives of the scientists.

By and large, women and girls who adopted Islamic dress apparently did so of their own volition, although it was not unusual for men to insist that their sisters, wives, and daughters cover their hair in public.

By four wives and at least four mistresses, he left eight children.

By one of his wives he had a son named Masubech, or Maksud beg, whom he kept in prison, because he was detected in corresponding with his rebellious brother Ogurlu, and whom he afterwards put to death.

By 1968, classes in sewing, knitting embroidery, spinning, press composition typing and stenography were established in centers throughout the city for the wives and daughters of mill workers.

By the end of his life, Roosevelt had had four wives and seven children.

By these wives, though, three children are known:

By the 1670s, Ganga Zumba had a palace, three wives, guards, ministers, and devoted subjects at his royal compound called Macaco.

By extension of this tale, the maengu are said to be the wives of the rats, as the ancestor of the rats also lost the bet and fled to the forest.

By June lurid rumors were circulated and perhaps invented by the champion of repatriating " colonization ", James Watson Webb, through his newspaper Courier and Enquirer: abolitionists had told their daughters to marry blacks, black dandies in search of white wives were promenading Broadway on horseback, and Arthur Tappan had divorced his wife and married a negress.

By now he was an older man usually with two or more wives and several children ( Yerlitta / Father ).