Thank you very much horselydown86, I am very grateful for this.
Is Thomas listed in the IPM as a Gent or alluded to being lord of the manor?
Or would this come under 'he was seased in his demesne as of fee of & in the manor of Cosby in Cosby' His 'demesne' being the land he personally owned and farmed and that it was and in the Manor/Lordship of Cosby?
The Leicestershire Archaeological society's publication gives that in 1551 Thomas, now styled a 'Gentleman' purchased from a local squire, The manor of cosby and 4 messuages, 2 cottages, 6 orchards, 6 gardens, A Windmill, A horse mill and 805 acres of land across Cosby and Littlethorpe. I'm still to find these records.
I'm unable to find a rough sizing for a Toft or Croft but altogether according to the IPM he was seized of roughly 400 acres give or take, which I assume to be his personal land not leased to anyone if my understanding of 'demesne' is correct.
Between 1543 and 1551, Thomas purchased 20 farms which I assume are some of the Messuages and Tenements with attached Virgates.
A good portion of the 1,221 acres he purchased altogether between 1543-1551 across Cosby and Littlethorpe, I assume have been sold prior to his death or leased and not mentioned here.