Poul Anderson 
Vault of the Ages [EPUB ebook] 

Archaeologists, studying the past, are handicapped by the fact that relics are usually few and in poor condition. Often, one is not even sure where to look for them. Out of such finds, from tombs, ruined cities, swamps, deserts, and any other place where men of the past have left some trace of themselves, the archaeologist tries to build up a picture of these men’s lives and civilizations. but there are great gaps in our knowledge and probably always will be. For Instance, we cannot yet read the inscriptions left by the ancient Cretans, and so are in the dark about many features of their high civilization…