Researching Wilkanowski's registered family data, it must be noted, that nearly all records until his death in 1954 were filled in cursive handwriting with ink pens by English speaking clerks. These handwritten records are full of spelling mistakes and very vague age and event estimates. None of the census records, marriage certs etc. provide exact dates of birth for any of the family members, typically only registering a loose estimate of age at the time of the census and a variety of misspelled Polish names. This makes exact date estimation of many life events for Wilkanowski quite difficult.