Construct a musical work following the provided guidelines and thematic elements.
X:1
L:1/8
Q:1/4=120
M:6/8
K:Bb
['B/c/S |{Bc} d.B.B Tc.B.B fdg fdb gcc', '(fd).B (fd).B', 'dBF dBf'  
X:1
L:1/8
Q:1/4=120
M:6/8
K:Bb
"^Slowish" B/c/S |{Bc} d.B.B Tc.B.B | fdg fdb | gcc Tc>de/f/ | gec c2 B/c/ |{Bc} dBB TcBB | 
 (fdb) !fermata!bag |{g} fe/d/c/B/ fdB | GFB !fermata!B2 :: d/e/ | (f/g/)f/d/b f/g/f/d/b | 
 gcc Tc>de/c/ | (f/g/f/)d/b f/g/f/d/b | TGFB TB2 d/e/ | (fdB)({B} fdB) | fgg Tg>ab | 
 (fd).B (fd).B | ecc c2 d/e/ | (fd).B (fd).B | fga !fermata!b2 a/g/ | fdB fdB | 
 (cc/d/)e/c/ !fermata!g2 f/"_D.C."e/S |] d/B/ | (F_A).A (GB).B | A/(F/G/A/)F B2 (d/B/) | 
 (F_A).A (GB).B | A/F/G/A/F B2 B/c/ | dBF dBf | dBB e(f/e/d/)c/ | dBF dBf | 
 dBB"_D.C.al Segno" !fermata!e2 f/e/S |]  