Hi Howard, I went to the library again this afternoon to try and solve 'The Mystery of Maltby Street'.I decided to use the Burgess Rolls which were a kind of early version of Electoral Registers.They are very much under-used by searchers,but they are very useful for looking for people in the between-census years. There wasn't a B.Roll for 1881,but there was one for 1879-80,and one for 1883-4. In 1879-80 I found the following--- 13,Maltby Street.Occupier-Alice Crabtree. So the David Benson Marr.Cert.WAS correct after all.There WAS a No.13 before 1881. In the 1883-4 B.R there was no trace of No.13 ; in fact,apart from No.4,the lowest number was 15,just as I found on the 1881 census yesterday. Incidentally my disgraceful sense of humour almost got me thrown out of the library !!!! I got a bout of irreverent mirth at finding the following in the Maltby Street area------Dick Lane,Gay Lane and Sodom Lane !!!!!!!!!!! Cheers----------Derek.