Here is a much fuller listing of Hopwood and Crew's serial numbers for HC's sheet music chronologically arranged.
1862

407
416

1863

485
492
493
495
496
(589)

1864

516
563
573

1865

588
600
607
703
732

1866

737
760
766
787
795
936
944
952
988
989
995
996
997
(1371)
(1477)

1867

1158
1215
1222
1258
1263
1267
1389

1868

1383
1429
1479
1480
1542
1589
(1893)

1869

(1388)
1601
1656
1723
(2183)

1870

1851
1879
1944
1947
2172 may be later (1871)

Apart from a few misplaced they seem to follow a regular pattern well enough to date any others that turn up without a date.