Then they come slidderin' past Fairlight in a great smoky pat vambrished with red gun-fire, and our ships flyin' forth and duckin' in again. The smoke-pat sliddered over to the French shore, so I knowed Frankie was edgin' the Spanishers toward they Dutch sands where he was master. I says to my Aunt, "The smoke's thinnin' out. I lay Frankie's just about scrapin' his hold for a few last rounds shot. 'Tis time for me to go."
This is from "Simple Simon" in "Rewards and Fairies" by Kipling.
I do not understand the meaning of this.
scrapin' his hold for a few last rounds shot
I am so glad if somebody kindly teach me.