J. W. Thirtle (The Titles of the Psalms, 1904) advances the hypothesis that both superscriptions and subscriptions were incorporated in the Psalter, and that in the process of copying the Psalms by hand, the distinction between the superscription of a given psalm and the subscription of the one immediately preceding it was finally lost. When at length the different psalms were separated from one another, as in printed editions, the subscriptions and superscriptions were all set forth as superscriptions. Thus it came about that the musical subscription of a given psalm was prefixed to the literary superscription of the psalm immediately following it. The prayer of Habakkuk (
Hab 3) was taken by Thirtle as a model or normal psalm; and in this instance the superscription was literary. "A prayer of Habakkuk the prophet, upon Shigionoth," while the subscription is musical, "For the Chief Musician, on my stringed instruments." The poem of Hezekiah in celebration of his recovery (
Isa 38:9-20) seems to support Thirtle's thesis, the superscription stating the authorship and the occasion that gave birth to the psalm, while
Isa 38:20 hints at the musical instruments with which the psalm was to be accompanied in public worship. If now the musical notes be separated from the notes of authorship and date that follow them, the musical notes being appended as subscriptions, while the literary notes are kept as real superscriptions, the outcome of the separation is in many instances a more intelligible nexus between title and poem. Thus the subscript to
Ps 55, "The dove of the distant terebinths," becomes a pictorial title of 55:6-8 of the psalm. The application of the rule that the expression "for the Chief Musician" is always a subscript removes the difficulty in the title of
Ps 88. The superscription of
Ps 88, on Thirtle's hypothesis, becomes "Maschil of Heman the Ezrahite."
Ps 87 thus has a subscript that repeats the statement of its superscription, but with an addition which harmonizes with the content of the poem. "Mahalath Leannoth," with a slight correction in vocalization, probably means "Dancings with Shoutings," and 87:7 speaks of both singing and dancing. The tone of
Ps 87 is exceedingly cheerful; but
Ps 88 is the saddest in the entire Psalter. The application of Thirtle's hypothesis also leaves
Ps 88 with a consistent literary title, whereas the usual title ascribes the psalm first to the sons of Korah and then to Heman the Ezrahite.