Thomas Hiller is listed as a freemason member of the Lodge of Emulation united with the Morning Bush Lodge on October 14th 1799 aged 30, profession: mariner, residence: Margate.
He is known to have also been a member of the Trinty Lodge (the Trinty House organisation for supporting mariners) as he makes reference to requesting help from the Elder Brethren when he is in financial trouble and as risk of being made homeless.