The possible survival of the Dauphin, King Louis XVII

I found this information in a book.

"So absolutely convinced was Pope Pius VII of the existence of King Louis XVII as late as 1816 that, in the January of that year, when the French Chamber decided to erect an expiatory chapel in memory of Louis XVI, Marie Antoinette, Madame Elizabeth and the Dauphin Louis XVII, he remonstrated with the King—Louis XVIII—and obliged him to issue a decree eliminating the last of these; in consequence of which action of the Holy Father the expiatory Chapel was dedicated only to the memory of Louis XVI, of the Queen and of Madame Elizabeth. As the Pontiff is said to have expressed it: “If I cannot prevent you from committing a political fraud, I have, at least, the power to stop you from perpetrating a sacrilegious one!”

Louis XVIII of France and the Seer of Gallardon.

"On the fifteenth of January in the year 1816, Antoine Thomas Ignace Martin a farmer who lived in Gallardon, not far from Chartres, was working busily in his fields as usual about half-past two in the afternoon; when, being bent over his spade, he was suddenly conscious that somebody was watching him and speaking to him, although he could not distinguish the actual words of what was being said. Presently, however, he looked up; and, there, only a few feet away, he saw standing a small man, very pale and gentle-looking, wearing a brown coat buttoned in the fashion of those days from the chin nearly to the feet, together with a round hat. Without being in the least uncomfortable at sight of the stranger whom he took to be there for the purpose of asking the road to some place or other, Martin inquired, leaning on his spade:

“Can I do anything for you, sir?”

“Yes,” was the reply, “you can. I am sent to you by God with a message. You are to go to the King?........."
Storied Italy, : Hugh Fraser : Free Download, Borrow, and Streaming : Internet Archive

Anybody interested in the question of whether the Dauphin (King Louis XVII) son of Louis XVI and Marie Antoinette escaped the Temple Prison, might find both Chapters 10 and 11 in this 19th century book interesting.

The story involves little known apparitions of St Raphael the Archangel to Thomas Martin a humble farmer in a village not far from Chartres. The Archangel insists that M. Martin visits King Louis XVIII and gives him a message regarding why the Throne can never be his. Eventually, the Seer gets to meet the King, and the message he is given by St Raphael to pass on to the King is frankly incredible!

The tale eventually involves not only Pope Pius VII, Louis XVIII, Charles X. George IV of GB, Napoleon's paramour Josephine and the truth behind the myth of the murder of the Duc de Berry outside the Opera House in Paris..