On the line of Internal language unawareness, I found a word that has “th”, but not a [θ] sound.
I am thinking of a word, universally admitted to be English, that has the letters S and H together, but which is never pronounced as if it contains the [ʃ] phoneme.
My grand mother’s house is full of discarded teaching and educational methods and trends from her decades of working in a public school. One of them is a stack of little books written in the “Initial Teaching Alphabet“, which was a quasi-reformed way of spelling and writing (orthography) to help children learn English without reference to the obnoxious spelling of English. It has evidently faded out of any practical us.
The plot is that the boy, who lives in a row house in Chicago, takes the bus to his grand mother’s place, and meets her at the bus stop, as shown on the cover.