I have the CD Roms of 1841, 1851 + 1861 IoM census - there is an index to the IoM censuses on www.lawsons.ca which gives the ref number which would give you access via ancestry to actual image - I was fooled by both Brian's original index and the transcription by the IoM FHSoc which both gave age 11 - the 4 is quite distinct on the CD Rom but could on a poor microfilm be read as 11