First Letterkenny was completely rebuilt in 1909 but 12 years later was destroyed by a fire. The other congregation offered the use of its premises. This brought them closer together which paved the way for a union in 1925 under the Rev. Dodds. The building on Main Street was restored and the name 'Trinity' was officially adopted. Also, Gortlee Reformed Presbyterian was also adopted into this union. More at Link (Archive Link )