“…At present, there are a number of contentious issues regarding (a) whether the omissions in the series from one census to the next are of such significance that they cannot be remedied -especially for women, but also for men (see Desrosières & Thévenot, 1992;Marchand & Thélot, 1991); (b) the nature and extent of under-registration of working women (see, for example, Higgs, 1987, but also the articles by Devos et al (2014);McGeevor (2014);van Nederveen Meerkerk & Paping (2014), and by Stanfors (2014) in this issue); and (c) the putative causes of such under-registration. As to the latter, one pressing issue concerns whether women's work was under-recorded simply because the census takers followed instructions that sometimes required them to ignore part-time, seasonal, or auxiliary work (as argued by Shaw-Taylor, 2007, andby McGeevor (2014) in this issue) or because they ignored such work despite their instructions, refusing to accept that such work was work when it was performed by women (Humphries & Sarasúa, 2012). Whatever the cause of the under-registration, the fact that there was under-registration of part-time work, and that the extent of such under-registration varied from census to census (McGeevor, 2014;van Nederveen Meerkerk & Paping, 2014, both in this issue; Schmidt & van Nederveen Meerkerk, 2012), in part because the instructions given to the census takers changed, makes the census a more difficult source in that respect than, for example, marriage records, where occupations were self-declared.…”