B. Carmon Hardy, Solemn Covenant: The Mormon Polygamous Passage, (Urbana and Chicago: University of Illinois Press, 1992,)
Between 1890-1910: LDS leaders solemnized at least 262 known plural marriages in the post-manifesto years when the church was pretending to be 100% against polygamy (source: Hardy, A Solemn Covenant, 1992)-- most of whom by either apostles like Taylor & Cowley (later ex-communicated) or by Ivins in Mexico, who was rewarded for this & made a general authority in the early 1900s, or by others who became general authorities after solemnizing such plural marriage vows.
Hardy lists the specific people involved in these plural unions in his appendix of the book, and is able to provide specific years these plural unions took place in most cases, along with a list of plural wives for each man.
Mormon leaders did not break up most of the polygamous arrangements that were already intact in 1890 & thereafter. B. Carmon Hardy shows in his book's appendix that some of those polygamous unions lasted into the early 1960s...some of those who were secretly solemnized in the early 1900s.
So when Mormons say polygamy "ended" in 1890 among mainstream Mormons, there's "no way" when there wasn't even a Mormon monogamous "prophet" at the helm until the mid-1940s!
Btw, Hardy devotes a full chapter in that 1992 book to how LDS regarded polygamy as sexually superior to monogamy--not for erotic or "orgy-like" reasons--but for what they regarded was the "opposite"--associating prostitution and the resulting ill-health with monogamy, etc.
IoW, some Lds 19th century leaders were openly attacking monogamy.
Very interesting