I must down to the seas again for the call of the running tide Is a wild call and a clear call that may not be denied.
ATTRIBUTION:
John Masefield (18741967), British poet, playwright. Sea Fever, st. 2, Salt-Water Ballads (1902).
The line appears as I must go down to the seas again ... in some collections, and in John Irelands musical setting of the poem; though apparently not in Masefields drafts, nor in the first published version.