James Millar's replacement at Lundin Mill around 1863 had been Isaac Nevin. Isaac spent around 2-3 years at Lundin Mill before moving on to St Monans where he was school master for 42 years. A well-known and active member of the St Monans community, he died in 1911.
Around 1865 or 1866, Thomas Sime replaced Isaac Nevin at Lundin Mill School. Thomas Sime was born in Kingsbarns in 1844 to James Sime and Margaret Jamieson. James was an agricultural labourer turned coal miner - the family moved to Durie Broom, Scoonie due to this change of work. In 1851, Thomas and his three siblings were school children there. Another move followed as James became manager of an ironstone mine outside St Andrews. The 1861 census finds the family in Strathkinness with father and eldest son ironstone mining while second son Thomas was a 'pupil teacher' aged 17.
While teaching at Lundin Mill, on 20 September 1866, Thomas married Isabella Middleton at Park Place, Stirling. She was a farmer's daughter from Edzell. Sadly, the couple lost babies at birth in both 1867 and 1868 and this perhaps was a factor in their relocation to Kilconquhar in 1868. Thomas Sime replaced Peter Proudfoot as school master there. Proudfoot himself had moved to Leuchars, where he would teach for over thirty years. A pioneer of golf at Elie, Proudfoot apparently helped old Tom Morris to lay out the course there. Proudfoot died at Burnbrae, Largo in 1907, where he had been residing with a daughter.