Steve,  A partial answer:  (1) Registration District. Here, Irvinestown.  (2) Not sure -- it's either the page or the entry number. My educated guess is that it's the page.    In the IGI, they DO NOT extract the townland of birth. The format is as follows:    Page or entry number, Registration District, County, Country.    -Clare L.    -----Original Message-----  <<< Birth: 14 APR 1864 0153, Irvinestown, Fermanagh, Ireland.    resulting in my two questions.    1) I had believed that he was born in Killymendon, County Tyrone (which is nearby). Does the birth designation specify the actual place of birth or simply the place of registration of that birth?    2) What does the 0153 mean?    >>>