fritillaries (pg. 52) -- Well, it's a kind of plant. That's what I get from wikipedia.
Lammas (pg. 52) -- August 1st is Lammas Day, a festival of the wheat harvest.
distraints (pg. 53) -- The legal right of a landlord to obtain a court order and seize tenants'possessions to pay for back rent.
euphroes (pg. 234) -- A suspended batten or plate of wood or brass pierced with holes through which the cords of a crowfoot are rove to suspend an awning.
Clarissa Harlowe (pg. 164) -- The heroine of one of Richardson's novels, exhibiting a female character which, as described by him, is pronounced to be "one of the brightest triumphs in the whole range of imaginative literature," is described by Stopford Brooke "as the pure and ideal star of womanhood." Interesttingly, the famous nurse Clara Barton's real name is Clarissa Harlowe Barton.
vitiated air (pg. 267) -- To reduce the value or impair the quality of.
"What's the buzz, Bob?" -- (pg. 157)
...and she had read right through Clarissa Harlowe without hanging herself (although that was sometimes only for want of a convenient hook)... -- (pg. 164)