1849 Black Ball Line's Yorkshire manifest shows John Clynch age 30 and Ellen age 28. My digging suggests john was actually 37 and Ellen 41. How was age of passenger managed? Did the passenger provide the info? Did some agent look at a person, guess at an age and write it down? Was there some incentive to under-state one's age when purchasing tickets? There is quite a separation from the manifest info and my information to make me question whether these two passengers are my ancestors; well, three passengers, the infant is un-named, as seems to be the practice for toddlers under the age of two. I am not familar with manifests, so relying on all the experienced viewers out there.