Here's an interesting snippet from the story:
Orthodoxy and unity were key reasons the sisters were attracted to the Catholic faith. Many of them were troubled by the Episcopal Church’s approval of women’s ordination, the ordination of a gay bishop and what they regarded as lax stances on moral issues.May Jesus's prayer in John 17 be perfectly fulfilled. These nuns could only find the unity Christ prayed for in one place...
“We kept thinking we could help by being a witness for orthodoxy,” said Sister Mary Joan Walker, the community’s archivist.
Mother Christina said that effort “was not as helpful as we had hoped it would be.”
“People who did not know us looked at us as if we were in agreement with what had been going on (in the Episcopal Church),” she said. “By staying put and not doing anything, we were sending a message which was not correct.”
Before deciding to enter the Catholic Church, the sisters had explored Episcopal splinter groups and other Christian denominations. Mother Christina noted that the sisters had independently contemplated joining the Catholic Church without the others knowing. When they found out that most of them were considering the same move, they took it as a sign from God and reached out to Archbishop O’Brien.
“This is very much the work of the Holy Spirit,” Mother Christina said.