Page 4. " framed within Dundreary whiskers "
Mr Sothen's portrayal of Lord Dundreary 1858
Public DomainMr Sothen's portrayal of Lord Dundreary 1858

 Dundreary whiskers were long, bushy sideburns, a fashion named after a fictional character in Tom Taylor's 1858 play Our American Cousin. Lord Dundreary was a particularly foolish aristocrat who also gave his name to Dundrearyisms, extended Malapropisms.

By the time of the book, these whiskers would have been an out-dated fashion.  

Mr Sothen's portrayal of Lord Dundreary 1858 featured very long whiskers, whereas Ibsen's adoption of them is probably how they were worn in everyday life.

 

Henrik Ibsen c.1900 (373 * 500)
Public DomainHenrik Ibsen