I needed to find some Regency expressions used when surprised or horrified. I found some and am saving the list here so I, and others, can find it easily. I only kept the Regency ones from this list http://www.joannawaugh.com/expressions.html
ahem – c. 1765
bah –c. 1600
balderdash – c.1675
barmy — c. 1600
beastly – c. 1200
begad – c. 1600
blast and bugger your eyes — c. 1793
blasted – (damned) c. 1600
bloody (very) –mid 17th – 18th C.
bloody (damned) – c. 1670
botheration – c. 1745
bravo – c. 1765
brava – c. 1805
bugger (noun) — c. 1719
by (Saint) George – c. 1719
by Jove – c. 1570
capital – c. 1760
criminy – c. 1700
daft – c. 1450
damned — from 16th C.
damnable – from 16th C.
damnation – c. 1630
dang — c. 1790
darling (n) c. 900 (adj) c. 1510
darn – c. 1790
Dash! (damn!) c. 1810
Dash my wig! C. 1810-1880
dear — c. 1675
dem/demned (damn/damned) — from late 17th C.
demme (damn me) — c. 1753
deuced (damned) — c. 1785
devil a bit – after 1750
devilish – c. 1450
devil of a… – c. 1750
devil take it – from 16th C.
devil to pay – from 15th C.
dickens (What the dickens?) – late 1600
egad — c. 1675
eureka – c. 1570
excelsior – c. 1780
fiddle-de-dee – c. 1785
fiddlesticks – from 17th C.
fudge – c. 1770
fustian (bombast) — from late 18th C.
gads — from 17th C.
gadzooks — c. 1655
ghastly – c. 1325
goody – c. 1800
golly – c. 1775
good gracious – from 18th C.
gosh – c. 1760
go to the devil – from 14th C.
gracious – from 18th C.
hallo — c. 1570
halloo — c. 1700
hell — c. 1600
hellfire — before 1760
humbug – c. 1740-54
hurrah — c. 1690
huzzah — c. 1595
hurray/hooray — c. 1800
I’ll be bound – c. 1530
I say – from 17th C.
Jupiter! – from 17th C.
kiss my ass — c. 1705
la – from 16th C.
lawks – c, 1765
lo and behold — by 1810
lud! – ca 1720-1850
mind (note what I say) — from 1806
oh! – c. 1550
oh-oh — c. 1730
outside of enough – c. 1811
pah — c. 1600
Perdition! C1450-1600
pish — c. 1595
pooh — c. 1600
pshaw — c. 1675
rot it – 17th — 18th C.
rubbish — c. 1630
shag – c. 1790
shit — c. 1510
sirrah – from 16th C.
son of a bitch (interjection) by 1675
son of a bitch (noun) c. 1710
son of a gun — c. 1710
sweetheart – c. 1290
sweetie — c. 1800
sweetikins — c. 1600
sweeting – c. 1350
tallyho – c. 1770
tosh – (nonsense) c. 1530
What (how) the devil – from 17th C.
zooks – c. 1635
zounds – c. 1600