One was a limestone motif and coat of arms above the main entrance to The Royal Institute of the Blind building in Mappin Street, executed in 1938.

He also designed the internal boss in relief at the centre the dome, only visible from the sanctuary, depicting the Assumption of the Blessed Virgin Mary into Heaven.

"What can I do but explain something of what I have tried to say in stone, with the large Statue outside of St. Theresa offering herself to God, and inside the Stations of the Cross.

I have tried by the elimination of what I think to be non-essential details, to arrive at the greatest possible simplicity of treatment, thereby giving emphasis to what is expressed... You see also a contrast in the large Crucifix by my son Michael Clark, showing Our Lord as Christ The King, reigning from the cross.

Our Lady offering to us the Holy Child, in swaddling clothes; a kneeling St Theresa, showing her love for Our Lord in the way she holds and looks at the crucifix; the Sacred Heart in all the humility of His burning love for humanity; then St. Joseph the Carpenter, guardian of the Holy Family."

This collaboration between father and son together with the large amount of Clark family original works in one building, twenty individual sculptures, make the church of St. Theresa of significant cultural importance to twentieth century devotional art and Catholic history.