Howling:Gallifrey's destruction in past novels

I have heard that long before the new series came along, there were some DW novels published by Virgin and BBC Books, taking place in the classic era, where the Doctor occasionally encountered hints that, for some people and places, Gallifrey was already long since dead. I think one such reference occurs in "Goth Opera", and it's been said that the planet New Alexandria in "The Crystal Buchephalus", is implied to be Gallifrey in its distant future (The novel takes place around the tenth millennium AD). Can anyone help flesh out these details a little more? Are there any other such references in other books (excluding the War arc in the Eighth Doctor novels culminating in "The Ancestor Cell")? Thanks. EJA 19:05, April 29, 2011 (UTC)