Which version of Roud are you using? The online one is not up-to-date yet.

The 2 you got are 'Kendrew of York' who was printing 1801-1841. By the physical properties on the slip I'd say about 1835 for that printing.

The Pitts one is before 1819 as he changed his address from 14 to 6 Gt St Andrews St then.

The other 2 which I'll try to resend are

No imprint but judging by printing style it could be anything from 1790 to about 1810.

I haven't got an up-to-date version of Roud myself at the moment, or rather I have got it but I can't bring it up as I haven't got Access 2010 which is what Steve is now using. I'll ask him what the current state of play is on this one.

The other Birt you can easily get a date off the Bodl. but he was roughly contemporary with Pitts and Catnach.