'The Furrow' metal and earth sculpture

The first of four sculptural installations at the Robert Burns Birthplace Museum at Alloway, Ayr, commissioned by the National Trust for Scotland in 2010 for the Museum's main entrance. 
Steel words from poems by Burns are ploughed from the earth, and picked over by bronze crows. Interpretation by Tim Chalk: “Frae Furrow tae Firmament in four Lowps; the first Lowp.” 
The word the crow has grasped is 'brattle' from a quote from "To a Mouse' (Pictured back to front in this shot.)  'Brattle' translates as 'prattle'. Lowp means 'leap'.
To a Mouse
Wee, sleekit, cowrin, tim'rous beastie,
O, what a pannic's in thy breastie!
Thou need na start awa sae hasty, 
Wi' bickering brattle!