Very poorly rowan tree

I bought myself a rowan tree from the Woodland Trust in January and planted it (a stick!) soon after it arrived and it grew well. Unfortunately now it has brown marks on the leaves, one dead branch, and a selection of tiny grey 'pearl' type eggs on the top of one leaf -oh, and a tiny snail... how can I help the poor thing

 

Good evening, Barbara, and welcome to the site. Any chance of a picture? ( Of the tree, that is ):D

 

Do you want to help the tree or the snail Barbara or both, send also a picture of the snail and eggs and we will try and identify those as well.

 

Will sort out some photos (and how to post them) asap - and yes, thank you Walnut, it's the tree I want help with :-) the snail was 'removed to a reasonable distance'. It was a remarkably pretty snail I must say, and about the size of a baby's fingernail.

 

I've got 3 photos - eggs (or whatever they are) brown spots and damaged branch. The tree is about 2 ft high.
Unfortunately it appears I'm not allowed attachments - can I email them to you?
Barbara

Managed to figure it out! (with daisees help)

 

Sorted!

 

and

 

and finally

 

No luck so far Marley - I do hope someone can help, I've never planted a tree before and I'd be really sad to lose it. Please help someone!