St. John Henry Newman on Conscience and the Pope

Here ([*On Conscience and the Pope*](https://www.newmanreader.org/works/anglicans/volume2/gladstone/section5.html)) is found an essay written by St. John Henry Newman. It begins as follows: > IT seems, then, that there are extreme cases in which Conscience may come into collision with the word of a Pope, and is to be followed in spite of that word. I found this essay published in 1875 by The Catholic Publication Society here: [*A Letter Addressed to the Duke of Norfolk on Occasion of Mr. Gladstone's Recent Expostulation: Certain Difficulties Felt by Anglicans in Catholic Teaching*](https://ia904704.us.archive.org/10/items/a678635200newmuoft/a678635200newmuoft.pdf) . The link contains an expanded title. However, this book has neither Approbation or Imprimatur by competent *Catholic* ecclesiastical authority. QUESTION: Does anyone know of a publication which contains the above essay; and which comes with a valid Imprimatur? Preferably, the book will be accessible online. If not, that's O.K. too.