Cryptic Quiz

[megfitz]

Hi, can anyone help with these; Title is
Down by the Riverside.
Tediously moving upstream 6,4
Tributary is a fifth shorter than the main stream 4
Navigable depth for old man's biographer 4,5
Cornish river system-classified? 5
Site of old folks home 3,6,5
This years Quiz is morebrain-frying than ever!! many thanks for help/ideas

[quinie]

5 The Swanee River?

[hardyboy]

Agree with quinie -the Swanee river - from the song

[megfitz]

Thanks both- I was stumped , any ideas for the others?

[bibblebub]

3) Mark Twain ?

[hardyboy]

Severn bore

[megfitz]

Thank you both, I have Stem for no 2 but am not convinced . any better offers.

[hardyboy]

I have been trying to think of a river which has 5 letters inlcuding a v(5) which has a tributary of four letters without the v, i.e. Dover and Doer (ficticious obviously), but sadly unable to come up with anything. Sorry.