Lindy loo
In general, if numbers are missing then there can be several causes: the property could be a shop and no-one with a vote lived there; it could be empty; for a large property (often a pub, th eproperty takes up two numbers, but often only one is listed; or the street was numbered giving each "plot " a number, and no house was built on that number. However you refer aprticularly to the 1913 census, and , with certasin exceptions for local elections only, women did not have a vote until 1918, and therefore there were many houses not listed at all