The consular tribunes continued the war against the Veii that had begun the previous year and succeeded in surrounding and besieging the city.
Diodorus' account only includes three names, Capitolinus, Furius and Aemilius, but mentions that the college consisted of six members.
As other sources agree on the number of consular tribunes and on the three remaining names not listed by Diodorus, it can therefore be assumed that Quinctius should be included in the college of 405 BC.
Suolahti's main suggestions for these unknown censors are Spurius Nautius Rutilus and Manius Aemilius Mamercinus but adds Quinctius, as one of a few viable candidates.
While Suolahti argues for the existence of these unknown censors and lustrum XV, it is noted by the author himself that these possible candidates are simply educated guesses based on the suitability of the candidates to the office and are in the author's words "mere suppositions".