Them claims marked with a crost belongs to th' Company.
Verb
crost
(archaicorpoetic)simple past tense and past participle of cross
1591,Edmund Spenser,The Poetical Works of Edmund Spenser, Volume 5:
[…] I did espie Where towards me a sory wight did cost*, Clad all in black, that mourning did bewray, And Iacob staffe in hand devoutly crost, Like to some pilgrim come from farre away.