This link gives you various indices, including wills:

www.iomfhs.im/lawsons/LawsonBMD/Main_Site_index.html

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This is the wills index:

www.iomfhs.im/lawsons/LawsonBMD/wills/_will_index.html?Submit=Wills+and+Transcriptions

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Click on G, then Gelling, then John Gelling 1855 Braddan. The will is very long and complicated but well worth reading (several times, in order to make sense of it)