THE PROPOSITIONS Of captain JOHN Bulmer, in the Office of Assurance, London; For the blowing up of a Boat and a Man over London-bridge.  
IN the Name of God, Amen. John Bulmer of London, Esquire: Master and surveyor general of the King's majesty's Mines royal, and Engines for water-works, propoundeth (by God's assistance) That he the said John Bulmer, shall, and will, at and in a flowing water, set out a Boat or vessel with an Engine, floating with a Man or Boy, in and aboard the said Boat, in the River of Thames, over against the tower-wharf, or lower. Which said Boat, with the said Man or Boy in or aboard her, shall the same tide before Low-water again, by Art of the said John Bulmer, and help of the said Engine be advanced and elevated so high, as that the same shall pass and be delivered over London-Bridge, together with the said Man or Boy in and aboard her, and float again in the said River of Thames, on the other side of the said Bridge in safety. And the said John Bulmer for Him, his heirs, executors, and Administrators, doth hereby covenant and promise, that he the said John Bulmer shall and will perform and accomplish the premises, within the space of one month next after he shall cause intimation to be given into the Office of Assurance, London, that he is about or intends to put the same in practice: which Intimation shall so by him be given at such time, and so soon as the undertakers against him wagering six for one, shall have deposited and left in the said Office such a considerable sum of money, as the said John Bulmer may compute will countervail the charges of contriving the said Boat and Engine, and such other disbursements as shall arise and grow in prosecution of the said business. And he the said John Bulmer shall and will deposit his proportion of moneys in the said Office accordingly. And the said moneys so deposided by the said undertakers, and the said Bulmer, shall remain in the said Office, until the said Bulmer shall either have accomplished the same, or the time expired for accomplishment thereof. And the said undertakers and every of them, shall subscribe and underwrite, such sum of money as they or any of them shall deposit, adventure, and wager, against the said Bulmer: which said moneys so deposited by the said undertakers, and the said John Bulmer, shall be delivered to the said Bulmer (in case of performance of the premises) otherwise to the said undertakers. Dated the 6. of November, 1643.  
And all those that will bring in their moneys into the Office, shall be there assured of their loss or gain, according to the conditions above mentioned.