Who'd have thought you could make beautiful music from a cow's guts?

Eastern Daily Press: Bow Brand based in King's Lynn, manufacture harp strings. Checking the strings in the drying room is David Chilvers. Picture: Ian BurtBow Brand based in King's Lynn, manufacture harp strings. Checking the strings in the drying room is David Chilvers. Picture: Ian Burt (Image: Archant 2017)

Tucked away off Dodman's Bridge, in King's Lynn, Bow Brand have been making natural gut harp strings for more than 100 years.

A by-product of the beef indistry, cow gut is reckoned to have a mellower sound than synthetic alternatives, as well as being much stronger than nylon.

Eastern Daily Press: Bow Brand based in King's Lynn, manufacture harp strings. Checking the strings in the drying room is David Chilvers. Picture: Ian BurtBow Brand based in King's Lynn, manufacture harp strings. Checking the strings in the drying room is David Chilvers. Picture: Ian Burt (Image: Archant 2017)

Before the wedding of Prince William and Catherine Middleton, in 2011, Royal harpist Claire Jones, who played at the couple's reception at Buckingham Palace, had her instrument re-strung with 47 strings from Bow.

Before gut can be played, it has to go through several wet and dry processes, to cure, stretch, polish and finally varnish it to turn it into strings.

Eastern Daily Press: Bow Brand based in King's Lynn, manufacture harp strings. Checking the strings in the drying room is David Chilvers. Picture: Ian BurtBow Brand based in King's Lynn, manufacture harp strings. Checking the strings in the drying room is David Chilvers. Picture: Ian Burt (Image: Archant 2017)

Bow Brand was set up near Highgate, in Lynn, in 1902 because the site was near an abbatoir, which provided a ready supply of raw materials.

Eastern Daily Press: Bow Brand based in King's Lynn, manufacture harp strings. Checking the strings in the drying room is Rosina Russell. Picture: Ian BurtBow Brand based in King's Lynn, manufacture harp strings. Checking the strings in the drying room is Rosina Russell. Picture: Ian Burt (Image: Archant 2017)

Eastern Daily Press: Bow Brand based in King's Lynn, manufacture harp strings. Checking the strings in the drying room is Rosina Russell. Picture: Ian BurtBow Brand based in King's Lynn, manufacture harp strings. Checking the strings in the drying room is Rosina Russell. Picture: Ian Burt (Image: Archant 2017)

Eastern Daily Press: Bow Brand based in King's Lynn, manufacture harp strings. Checking the strings in the drying room is David Chilvers. Picture: Ian BurtBow Brand based in King's Lynn, manufacture harp strings. Checking the strings in the drying room is David Chilvers. Picture: Ian Burt (Image: Archant 2017)

Eastern Daily Press: Bow Brand based in King's Lynn, manufacture harp strings. Gauging a string is Diane Toll. Picture: Ian BurtBow Brand based in King's Lynn, manufacture harp strings. Gauging a string is Diane Toll. Picture: Ian Burt (Image: Archant 2017)

Eastern Daily Press: Bow Brand based in King's Lynn, manufacture harp strings. The strings are ready for the varnishing process. Picture: Ian BurtBow Brand based in King's Lynn, manufacture harp strings. The strings are ready for the varnishing process. Picture: Ian Burt (Image: Archant 2017)

Eastern Daily Press: Bow Brand based in King's Lynn, manufacture harp strings. Picture: Ian BurtBow Brand based in King's Lynn, manufacture harp strings. Picture: Ian Burt (Image: Archant 2017)

Eastern Daily Press: Bow Brand based in King's Lynn, manufacture harp strings. Picture: Ian BurtBow Brand based in King's Lynn, manufacture harp strings. Picture: Ian Burt (Image: Archant 2017)

Eastern Daily Press: Bow Brand based in King's Lynn, manufacture harp strings. Picture: Ian BurtBow Brand based in King's Lynn, manufacture harp strings. Picture: Ian Burt (Image: Archant 2017)

Eastern Daily Press: Bow Brand based in King's Lynn, manufacture harp strings. Picture: Ian BurtBow Brand based in King's Lynn, manufacture harp strings. Picture: Ian Burt (Image: Archant 2017)

Eastern Daily Press: Bow Brand based in King's Lynn, manufacture harp strings. Spinning the strings is Sarah Middleton. Picture: Ian BurtBow Brand based in King's Lynn, manufacture harp strings. Spinning the strings is Sarah Middleton. Picture: Ian Burt (Image: Archant 2017)

Eastern Daily Press: Bow Brand based in King's Lynn, manufacture harp strings. Varnishing the strings is Richard Coe. Picture: Ian BurtBow Brand based in King's Lynn, manufacture harp strings. Varnishing the strings is Richard Coe. Picture: Ian Burt (Image: Archant 2017)