My "reconstruction", sketching how James Hook's complete piece may have sounded. Two voices suffice. Imagine a piano imitating a harpsichord.

X:1
T:Sir Sydney's March
C:James Hook, ca. 1800
C:arr. Grishka
L:1/8
M:C
K:G
Q:160
%%score { 1 |2 }
V:Right
Bc| d2d2d2d2| e2d2c2B2| dcBcA2dc| BcABG2dc| BdBdAdAd| GdGdGFdc| Bcded2+trill+^c2|\ % 8
d6::AG| FDFAdABc| +trill+B4B2dc| BGBdgde=f| +trill+e4e2g^f| egegdgdg| cgcgBgBg| egegdgdg|\ % 16
cgcgBgBg| e2d2c2B2| e2d2c2B2| e2d2c2B2| B2A2A2Bc| d2d2d2d2| e2d2c2B2|\ % 23
dcBcA2dc| BcABG2dc| BdBdAdAd| GdGdFdFd| EdEdFdFd| GdGdAdAd| EdEdFdFd|\ % 30
GdGdAdAd| cedcB2+trill+A2| G4G2:|]! % 33
V:Left
z2| G,2F,2E,2D,2| C,2E,2A,2G,2| F,2D,2E,2F,2| G,2D,2G,,2z2| G,2G,2F,2F,2|\ % 6
B,2B,2A,2F,2| G,2E,2A,2A,,2| D,2F,A,D2::z2| z2D,2E,2F,2| G,G,,B,,D,G,D,E,F,|\ % 11
G,2G,2A,2B,2| CC,E,G,CG,A,B,| C2C2B,2B,2| E2E2D2D2| C,2C,2B,,2B,,2|\ % 16
E,2E,2D,2D,2| CGB,GA,GG,2| C,G,B,,G,A,,G,G,,2| CG,B,G,E,G,^C,G,|\ % 20
D,2F,A,D2z2| G,,2G,F,E,2D,2| C,A,,B,,G,,A,,2G,,2| F,,2D,,2E,,2F,,2|\ % 24
G,,2D,2G,2z2| G,,2G,2F,2F,,2| B,,2B,2A,2A,,2| G,,2G,2A,2D,2| E,2E2F2F,2|\ % 29
G,2G,,2A,,2A,2| B,2B,,2F,,2D,B,,| C,2A,,2D,E,F,D,| G,2D,B,,G,,2:|]! % 33