C. Darwin
      & A.R. Wallace, 'On the Tendency of Species to form Varieties;
      and on the Perpetuation of Varieties and Species by Natural Means
      of Selection', Journal of the Proceedings of the Linnean
        Society, Zoology, 20 Aug. 1858, 3, pp.
        45-62.
    An Essay by Mr. Wallace,
      entitled "On the Tendency of Varieties to depart indefinitely from
      the Original Type."  This was written at Ternate in February
      1858, for the perusal of his friend and correspondent Mr. Darwin,
      and sent to him with the expressed wish that it should be
      forwarded to Sir Charles Lyell, if Mr. Darwin thought it
      sufficiently novel and interesting.  So highly did Mr. Darwin
      appreciate the value of the views therein set forth, that he
      proposed, in a letter to Sir Charles Lyell, to obtain Mr.
      Wallace's consent to allow the Essay to be published as soon as
      possible.  Of this step we highly approved, provided Mr.
      Darwin did not withhold from the public, as he was strongly
      inclined to do (in favour of Mr. Wallace), the memoir which he had
      himself written on the same subject, and which, as before stated,
      one of us had perused in 1844, and the contents of which we had
      both of us been privy to for many years.  On representing
      this to Mr. Darwin, he gave us permission to make what use we
      thought proper of his memoir, &c.; and in adopting our present
      course, of presenting it to the Linnean Society, we have explained
      to him that we are not solely considering the relative claims to
      priority of himself and his friend, but the interests of science
      generally; for we feel it to be desirable that views founded on a
      wide deduction from facts and matured by years of reflection,
      should constitute at once a goal from which others may start, and
      that, while the scientific world is waiting for the appearance of
      Mr. Darwin's complete work, some of the leading results of his
      labours, as well as those of his able correspondent, should
      together be laid before the public. We have the honour to be yours very
      obediently,     CHARLES LYELL.JOS. D.
    HOOKER. 
    
    
    
        Darwin received a letter from Wallace in April,
    1858, outlining all the main points of his own theory: "I never saw a more striking
      coincidence... If Wallace had my MS sketch written out in 1842 he
      could not have made a better short abstract!". Though
    clearly distressed by the loss of priority ["Your words have come true with a
      vengeance that I shd. be forestalled."], Darwin immediately
    notified his friends Lyell and Hooker, asking that the essay be
    published.  Lyell and Hooker agreed to do so, provided that
    Darwin also publish an abstract of his own work, which was much more
    extensively supported by facts then was Wallace's more speculative
    essay.  The
        papers by Darwin and Wallace, including the original essays of
        each, were read to the Linnean Society on 01 July 1858.
    The minutes of the meeting record no reaction. Darwin's book "On
      the Origin of Species by Natural Selection", which he referred
    to as an "Abstract", was published on 01 October 1859. It
    sold out on the first day, and went through six editions. 
    Darwin and Wallace remained close friends until Darwin's death in
    1882. Wallace was one of the pallbearers at Darwin's internment in
    Westminster Abbey.
    
    HOMEWORK: The penultimate
    sentence of the cover letter from Lyell & Hooker is fairly
    typical Victorian prose, and includes 133 words, 11 commas, and 2
    semi-colons. It would be considered a run-on sentence by
    21st century standards. Edit, so as to shorten sentence length.
    
    HOMEWORK: Compare and contrast
    the views of Wallace with respect to Darwin on natural selection and
    the origin of species, as of early 1858. To what extent is
      Wallace' MS a 'short abstract' of Darwin's presentation?