Isaac Pitman published his phonetic shorthand system (Sound-Hand) in 1837, six to eight years before the English Phonotypic Alphabet

isaac-pitmanpitman-shorthandspelling-reformhistory-of-linguisticsperson-bridge

Isaac Pitman's own phonetic shorthand system came first, and from the same spelling-reform interest that later produced the English Phonotypic Alphabet: "One of the outcomes of his interest in spelling reform was the creation of his system of phonetic shorthand which he first published in 1837, in a pamphlet titled Sound-Hand." That is roughly six to eight years before the EPA (dated 1843, completed 1845; see claim-pitman-and-ellis-co-created-english-phonotypic-alphabet), which Pitman co-created with Alexander John Ellis.

The sequence matters for the vault's new person-bridge between Gabelsberger shorthand and the Lepsius → IPA lineage: it is the same Pitman shorthand system — not a separate, later invention — that Gabelsberger's own mechanism is defined against (see claim-gabelsberger-shorthand-never-omits-vowels-unlike-pitman), and the same Pitman who went on to build the alphabet that fed the IPA. One reform interest, pursued by one man, produced both branches.