Each of these nine pictures represents a four-letter word. If you place those words in the right sequence, they will form a word chain in which one letter changes to make each new word. What is that word chain?

We intended the pictures to represent:
Top row: PEAR, LEAK, BELT - Middle Row: BOAR, PEAK, LEAF - Bottom row: BOLT, BEAR, BOAT
and we intended the chain to go: LEAF, LEAK, PEAK, PEAR, BEAR, BOAR, BOAT, BOLT, BELT