Conversation so far:
What kind of materials did Laurie Baker use?
Laurie Baker used local matrials.
How did Laurie Baker do the brick walls?
Baker made many simple suggestions for cost reduction including the use of Rat trap bond for brick walls.
Was air able to circulate in Laurie Baker's buildings?
Baker would use natural air flow to cool the buildings' interior.
Was saving money on materials important to Laurie Baker?
Baker is renowned for his cost-effective energy-efficient architecture and designs that maximize space, ventilation, and light.
Was Laurie Baker always there (working on his buildings)?

Question: Who was on of his earliest clients?
Self-contained rewrite: Who was one of Laurie Baker's earliest clients?