What's an epigraph in writing?
Epigraphy
Epigraphy (, "inscription") is the study of inscriptions or epigraphs as writing; it is the science of identifying graphemes, clarifying their meanings, classifying their uses according to dates and cultural contexts, and drawing conclusions about the writing and the writers. Specifically excluded from epigraphy are the historical significance of an epigraph as a document and the artistic value of a literary composition.
English orthography
The same letter (or sequence of letters) may be pronounced in different ways when it occurs in different positions within a word. For instance, the digraph represents the sound at the end of some words, such as "rough" . At the beginning of syllables (i.e. the syllable onset), the digraph is pronounced , as in the word "ghost" (pronounced ). Conversely, the digraph is never pronounced in syllable onsets and is almost never pronounced in syllable codas (the proper name "Pittsburgh" is an exception).