It should more than pay for the wine and the wherry to Spring Gardens.

Keep faith with me, you rascal, or I'll half wring your head from your shoulders and give you a free taste of what's bound to come to you some day--the rope at Tyburn." Jarvis grinned in sickly fashion and swore by all that was unholy to carry out his orders strictly.

Rofflash then strode away.
How Jarvis contrived to lure Vane to Spring Gardens is not of much consequence.

The fellow had a soft, slimy tongue and an oily manner.
Moreover, Rofflash's shrewd guess at Vane's absence of will power after a drinking bout was verified to the letter.
The passage up the river from St.Paul's Stairs was pleasant enough.

The wherry made its way through a crowd of boats bound for the Gardens, though the season had hardly begun.