It was renamed "Kirkpatrick" for Ralph Kirkpatrick, eminent American harpsichordist, clavichordist, musicologist and teacher.
For Domenico Scarlatti, the Longo catalogue (L numbers) was in use from 1906, and although it has become generally superseded by the 1953 Kirkpatrick catalogue (K or Kk numbers), L numbers are still seen in references.
He is perhaps most notable for his 1967 edition of the 555 keyboard sonatas of Domenico Scarlatti, which purports to correct some anachronisms and provides an alternative numbering system (distinguished by P numbers) to those of Alessandro Longo (L numbers) and Ralph Kirkpatrick (K or Kk numbers).
Alessandro Longo's 1906 catalogue (L numbers) was superseded by Ralph Kirkpatrick's 1953 catalogue (K or Kk numbers).
Ralph Waldo Emerson | Ralph Lauren | Ralph Nader | Ralph Vaughan Williams | Ralph Fiennes | Ralph Steadman | Ralph Macchio | Ralph Bunche | Ralph Bakshi | Ralph Richardson | Ralph Stanley | Ralph McTell | Ralph Ellison | Ralph Jordan | Ralph | Ralph Abercromby | Ralph Molnar | Ralph Records | Ralph Peterson, Jr. | Ralph Klein | Ralph H. Fowler | Jeane Kirkpatrick | Ralph Tresvant | Ralph Moore | Ralph Wilson | Ralph Terry | Ralph "Shug" Jordan | Ralph Peterson | Ralph Percy, 12th Duke of Northumberland | Ralph Inzunza |
After studying with José Iturbi and Ralph Kirkpatrick and débuting in 1950, he recorded extensively, especially in the 1950s, and taught for forty years until his death.