Thank you GR2. Glad to have got the sense of it. Could I trouble you or someone else for a transcription though, because I can't make out all the wording.
With your assistance, I can now see ".. will is that if my son Henry Trippook ... the mind to put forth my Daughter Maryes ... out of my ... [pasture?] ... and shall ... it that he shall pay unto her or her Assigns the sum of ten pounds of lawfull English mony".
Any help with filling the gaps would be most welcome!