Definition of "tombless"

[…] or there we’ll sit,Ruling in large and ample emperyO’er France and all her almost kingly dukedoms,Or lay these bones in an unworthy urn,Tombless, with no remembrance over them.

1599, William Shakespeare, “The Life of Henry the Fift”, in Mr. William Shakespeares Comedies, Histories, & Tragedies […] (First Folio), London: […] Isaac Iaggard, and Ed[ward] Blount, published 1623, [Act I, scene ii]

But when all is past, it is humbling to treadO’er the weltering field of the tombless dead,

1816 February 13, [Lord Byron], “The Siege of Corinth”, in The Siege of Corinth. A Poem. Parisina. A Poem, London: […] [T[homas] Davison] for John Murray, […], stanza XVII, page 27, lines 444-445