Facsimile of explorer Sir  Thomas Button's signature in a letter to Lord Dorchester written "From my house att Cardiffe, this 16th of Februarye 1629" (26th of February 1630 New Style) and which is preserved in Public Record Office (State Papers, Domestic, Chas. I, vol. clxi, No. 10).
Christy,  Miller , ed.  (1894)  The Voyages of Captain Luke Foxe of Hull, and Captain Thomas James of Bristol, in Search of a North-West Passage, in 1631-1632, 1, London:  Hakluyt Society, p. lxviii
Thomas Button