July 11, 1850
England is in the midst of a craze for ferns. People scour the countryside for native ferns to add to their collections. In addition to keeping live ferns, they use the fern motif in their arts and crafts.
FR gets caught up in the mood. When her friend Miss Hutton asks her to collect Osmunda for her, FR undertakes the mission and brings home such a bundle that Miss Hutton is overjoyed. However, an acquaintance faults her for not leaving any for others. FR is sure there is plenty.
Eventually a number of ferns in Scotland and Ireland did become endangered, and remain so to this day.
Here is a nice article in Wikipdedia about this fern craze of the 19th century.