Mellotronists

When did "Selling England by the Pound" drop?  I haven't heard the 
original in ages, but isn't there 8-voice on a couple of cuts?  
Was "Six Wives of Henry VIII" released before "Tales From Topographic 
Oceans" or after it?  How about "Hero and Heroine" by the Strawbs?  I 
don't remember the dates, but these were the earliest appearances I 
can remember, and I used to wear my albums out by lifting and 
dropping the needle over and over on all of the cool keyboard bits.