The literature on roman aqueducts is published in books, journals, monographies and theses, most of which are difficult to find. We are therefore building a digital repository, named the Thomas Ashby Digital Repository (TADIR) which will contain pdfs of all the publications which we can find. Presently, we have more than 2000 references in the depository. The reference pages of the ROMAQ site indicate which papers we have as a copy (copy in repository). You can help us by sending us pdfs or photocopies of material which we do not have. We cannot publish the repository because of copyright restrictions, but will try to help researchers who need acccess to certain individual texts.