For the benefit of those who wish to delve deeper into the study of Roman law, and as a prelude to all textual criticism and research on Roman legal institutions, attention should be called to the scores of technical aids which facilitate study in the field.

Inasmuch as this chapter is intended as ageneral guide to further study- upon the basis of the introduction to Roman law pro­vided by the remainder of the book -the array of technical devices indicated is not limited to the period of the classical law but extends to the Justinianian age, and includes aids to the study of legal papyrology and epigraphy as well as tools for the use of Roman legal materials in the more limited sense of the term Roman law.

There exist a few similar guides to research. Indeed, one of these-in trans­lation-afforded the basis for this chapter in earlier versions of this volume,

1. Coilinet, P, ‘Repertoire des bibliographies, vocabulaires, index, con­cordances et palingdndsics du droit romain\RH24/25 (1946/47) 109­18.

In Italian, there is

2. Cosentini, C. Guida alia consuitazianedellefontigiuridiche romaneedel mezzi ausiliari ^indagine{4t.h cd., Catania 1954).

The present survey of research tools is somewhat more extensive than either of these works and attempts to list all the aids for research of recent date, whatever the nature of the research may be. The items are grouped in five categories: bibliographies, dictionaries and encyclopedias, indexes and con­cordances, comparison and stratification of texts, and palingeneses.