I always feel that GH wrote Sprig Muslin to resolve some of the problems with The Foundling. The basic plots are almost identical: hero proposes to heroine who he's known for ages out of duty rather than love; heroine is miserable because she's loved him secretly for years (though Hester has the guts to turn Gareth down); hero goes on picaresque journey during which he encounters a beautiful girl on the run and a silly youth; complex plot muddle results which hero sorts out with help from heroine, in the process realising he's actually in love with her.
I don't think Sprig Muslin is one of GH's best novels by a long way, but it's much more successful than The Foundling. Crucially, the beautiful girl - Amanda - has masses of character and is much more convincing and appealing than the dumb Belinda. And the love story is properly developed; Hester and Gareth spend a lot of time together and we see Hester (GH's oldest heroine at a shockingly elderly 29) come into her own after many years as a slightly dotty spinster who's lost her self-belief as a result of having to live with her overbearing inlaws.
Gareth is one of the very few GH heroes or heroines to have had a previous serious romantic relationship - with the beautiful Clarissa, who died after taking Gareth's spirited horses out against his will. To my mind this adds an unusual depth to the book's back story, and GH exploits it well; at one point Hester mentions that Gareth used to talk to her about Clarissa when no one else would let him mention her name, and elsewhere, neatly moving the plot on, Gareth's brother-in-law comments that actually Clarissa was a bit of a nightmare and he's better off without her.
A few other things I like:
- the relationship between Gareth's sister and brother-in-law; one of GH's rare portrayals of an affectionate, down-to-earth marriage
- GH's depiction of the enormous danger that Amanda has put herself in by running away, and that she just doesn't understand, exemplified by the ghastly would-be rapist Fabian Theale
- the section at the inn where Gareth, Hester, Amanda and Hildebrand end up hanging out together while Gareth recovers, and the way their different relationships develop
- Neil, Amanda's stern fiance.
A few things I don't like:
- the shooting... it never quite feels convincing, though it does the job in narrative terms
- the clumsy section in which Mr Weatherby runs into Neil and invites him back for dinner
- the overall shape of the plot - it's just too baggy, somehow, without the shape and coherence of the better novels
... and try though I do I can never find Gareth and Hester's relationship entirely convincing. She is just too drifty and dippy. I like her but it's hard to see her as the object of passion. Am I being unfair?