The present-day numbering system which Smith introduced some time between 1951 and 1964–65 (the year the Film-Makers' Cooperative started distributing 16 mm copies of his films) includes only films that survived up to that point. Thus this filmography is in no way a comprehensive list of all the films he has ever made, all the more as he is known to have lost, sold, traded or even wantonly destroyed some of his own works. The dating of the film presents another puzzle. Since Smith frequently worked for years on them and kept little to no documentation, the information varies considerably from one source to another. Therefore all available information has been added to the following list, inevitably resulting in a loss of clarity but having the advantage of giving the whole picture. The films are also known by variant designation, i.e. "Film No. 1", "Film # 1" or simply "# 1".